diff --git a/src/taxonomy/TaxonomyLayout.test.jsx b/src/taxonomy/TaxonomyLayout.test.tsx
similarity index 68%
rename from src/taxonomy/TaxonomyLayout.test.jsx
rename to src/taxonomy/TaxonomyLayout.test.tsx
index dcea6c2c3c..09f2398885 100644
--- a/src/taxonomy/TaxonomyLayout.test.jsx
+++ b/src/taxonomy/TaxonomyLayout.test.tsx
@@ -1,14 +1,9 @@
 import React, { useContext } from 'react';
-import { IntlProvider } from '@edx/frontend-platform/i18n';
-import { initializeMockApp } from '@edx/frontend-platform';
-import { AppProvider } from '@edx/frontend-platform/react';
-import { render } from '@testing-library/react';
 
-import initializeStore from '../store';
+import { initializeMocks, render } from '../testUtils';
 import { TaxonomyContext } from './common/context';
-import TaxonomyLayout from './TaxonomyLayout';
+import { TaxonomyLayout } from './TaxonomyLayout';
 
-let store;
 const toastMessage = 'Hello, this is a toast!';
 const alertErrorTitle = 'Error title';
 const alertErrorDescription = 'Error description';
@@ -20,14 +15,14 @@ const MockChildComponent = () => {
     <div data-testid="mock-content">
       <button
         type="button"
-        onClick={() => setToastMessage(toastMessage)}
+        onClick={() => setToastMessage!(toastMessage)}
         data-testid="taxonomy-show-toast"
       >
         Show Toast
       </button>
       <button
         type="button"
-        onClick={() => setAlertProps({ title: alertErrorTitle, description: alertErrorDescription })}
+        onClick={() => setAlertProps!({ title: alertErrorTitle, description: alertErrorDescription })}
         data-testid="taxonomy-show-alert"
       >
         Show Alert
@@ -46,36 +41,20 @@ jest.mock('react-router-dom', () => ({
   ScrollRestoration: jest.fn(() => <div />),
 }));
 
-const RootWrapper = () => (
-  <AppProvider store={store}>
-    <IntlProvider locale="en" messages={{}}>
-      <TaxonomyLayout />
-    </IntlProvider>
-  </AppProvider>
-);
-
 describe('<TaxonomyLayout />', () => {
   beforeEach(async () => {
-    initializeMockApp({
-      authenticatedUser: {
-        userId: 3,
-        username: 'abc123',
-        administrator: true,
-        roles: [],
-      },
-    });
-    store = initializeStore();
+    initializeMocks();
   });
 
   it('should render page correctly', () => {
-    const { getByTestId } = render(<RootWrapper />);
+    const { getByTestId } = render(<TaxonomyLayout />);
     expect(getByTestId('mock-header')).toBeInTheDocument();
     expect(getByTestId('mock-content')).toBeInTheDocument();
     expect(getByTestId('mock-footer')).toBeInTheDocument();
   });
 
   it('should show toast', () => {
-    const { getByTestId, getByText } = render(<RootWrapper />);
+    const { getByTestId, getByText } = render(<TaxonomyLayout />);
     const button = getByTestId('taxonomy-show-toast');
     button.click();
     expect(getByTestId('taxonomy-toast')).toBeInTheDocument();
@@ -88,7 +67,7 @@ describe('<TaxonomyLayout />', () => {
       getByText,
       getByRole,
       queryByTestId,
-    } = render(<RootWrapper />);
+    } = render(<TaxonomyLayout />);
 
     const button = getByTestId('taxonomy-show-alert');
     button.click();
diff --git a/src/taxonomy/TaxonomyLayout.jsx b/src/taxonomy/TaxonomyLayout.tsx
similarity index 81%
rename from src/taxonomy/TaxonomyLayout.jsx
rename to src/taxonomy/TaxonomyLayout.tsx
index ccebad1531..ffcefa123e 100644
--- a/src/taxonomy/TaxonomyLayout.jsx
+++ b/src/taxonomy/TaxonomyLayout.tsx
@@ -1,4 +1,3 @@
-// @ts-check
 import React, { useMemo, useState } from 'react';
 import { StudioFooter } from '@edx/frontend-component-footer';
 import { useIntl } from '@edx/frontend-platform/i18n';
@@ -7,15 +6,15 @@ import { Toast } from '@openedx/paragon';
 
 import AlertMessage from '../generic/alert-message';
 import Header from '../header';
-import { TaxonomyContext } from './common/context';
+import { type AlertProps, TaxonomyContext } from './common/context';
 import messages from './messages';
 
-const TaxonomyLayout = () => {
+export const TaxonomyLayout = () => {
   const intl = useIntl();
   // Use `setToastMessage` to show the toast.
-  const [toastMessage, setToastMessage] = useState(/** @type{null|string} */ (null));
+  const [toastMessage, setToastMessage] = useState<string | null>(null);
   // Use `setToastMessage` to show the alert.
-  const [alertProps, setAlertProps] = useState(/** @type {null|import('./common/context').AlertProps} */ (null));
+  const [alertProps, setAlertProps] = useState<AlertProps | null>(null);
 
   const context = useMemo(() => ({
     toastMessage, setToastMessage, alertProps, setAlertProps,
@@ -51,5 +50,3 @@ const TaxonomyLayout = () => {
     </TaxonomyContext.Provider>
   );
 };
-
-export default TaxonomyLayout;
diff --git a/src/taxonomy/TaxonomyListPage.test.jsx b/src/taxonomy/TaxonomyListPage.test.tsx
similarity index 73%
rename from src/taxonomy/TaxonomyListPage.test.jsx
rename to src/taxonomy/TaxonomyListPage.test.tsx
index eb714eb3ba..5c918760d9 100644
--- a/src/taxonomy/TaxonomyListPage.test.jsx
+++ b/src/taxonomy/TaxonomyListPage.test.tsx
@@ -1,25 +1,15 @@
-import React from 'react';
-import { IntlProvider, injectIntl } from '@edx/frontend-platform/i18n';
-import { initializeMockApp } from '@edx/frontend-platform';
-import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
-import { AppProvider } from '@edx/frontend-platform/react';
-import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import type MockAdapter from 'axios-mock-adapter';
 import {
-  act,
   fireEvent,
-  render,
+  initializeMocks,
+  render as baseRender,
   waitFor,
-} from '@testing-library/react';
-import MockAdapter from 'axios-mock-adapter';
+} from '../testUtils';
 
-import initializeStore from '../store';
 import { apiUrls } from './data/api';
-import TaxonomyListPage from './TaxonomyListPage';
+import { TaxonomyListPage } from './TaxonomyListPage';
 import { TaxonomyContext } from './common/context';
 
-let store;
-let axiosMock;
-
 const taxonomies = [{
   id: 1,
   name: 'Taxonomy',
@@ -39,81 +29,61 @@ const organizations = ['Org 1', 'Org 2'];
 const context = {
   toastMessage: null,
   setToastMessage: jest.fn(),
+  alertProps: null,
+  setAlertProps: jest.fn(),
 };
-const queryClient = new QueryClient();
-
-const RootWrapper = () => (
-  <AppProvider store={store}>
-    <IntlProvider locale="en" messages={{}}>
-      <QueryClientProvider client={queryClient}>
-        <TaxonomyContext.Provider value={context}>
-          <TaxonomyListPage intl={injectIntl} />
-        </TaxonomyContext.Provider>
-      </QueryClientProvider>
-    </IntlProvider>
-  </AppProvider>
-);
+
+const render = (ui: React.ReactElement) => baseRender(ui, {
+  extraWrapper: ({ children }) => (
+    <TaxonomyContext.Provider value={context}> { children } </TaxonomyContext.Provider>
+  ),
+});
+let axiosMock: MockAdapter;
 
 describe('<TaxonomyListPage />', () => {
   beforeEach(async () => {
-    initializeMockApp({
-      authenticatedUser: {
-        userId: 3,
-        username: 'abc123',
-        administrator: true,
-        roles: [],
-      },
-    });
-    store = initializeStore();
-    axiosMock = new MockAdapter(getAuthenticatedHttpClient());
+    const mocks = initializeMocks();
+    axiosMock = mocks.axiosMock;
     axiosMock.onGet(organizationsListUrl).reply(200, organizations);
   });
 
-  afterEach(() => {
-    jest.clearAllMocks();
-  });
-
   it('should render page and page title correctly', () => {
-    const { getByText } = render(<RootWrapper />);
+    const { getByText } = render(<TaxonomyListPage />);
     expect(getByText('Taxonomies')).toBeInTheDocument();
   });
 
   it('shows the spinner before the query is complete', async () => {
     // Simulate an API request that times out:
-    axiosMock.onGet(listTaxonomiesUrl).reply(new Promise(() => {}));
-    await act(async () => {
-      const { getByRole } = render(<RootWrapper />);
-      const spinner = getByRole('status');
-      expect(spinner.textContent).toEqual('Loading');
-    });
+    axiosMock.onGet(listTaxonomiesUrl).reply(200, new Promise(() => {}));
+    const { getByRole } = render(<TaxonomyListPage />);
+    const spinner = getByRole('status');
+    expect(spinner.textContent).toEqual('Loading');
   });
 
   it('shows the data table after the query is complete', async () => {
     axiosMock.onGet(listTaxonomiesUrl).reply(200, { results: taxonomies, canAddTaxonomy: false });
-    await act(async () => {
-      const { getByTestId, queryByText } = render(<RootWrapper />);
-      await waitFor(() => { expect(queryByText('Loading')).toEqual(null); });
-      expect(getByTestId('taxonomy-card-1')).toBeInTheDocument();
-    });
+    const { getByTestId, queryByText } = render(<TaxonomyListPage />);
+    await waitFor(() => { expect(queryByText('Loading')).toEqual(null); });
+    expect(getByTestId('taxonomy-card-1')).toBeInTheDocument();
   });
 
-  it.each(['CSV', 'JSON'])('downloads the taxonomy template %s', async (fileFormat) => {
+  it.each(['csv', 'json'] as const)('downloads the taxonomy template %s', async (fileFormat) => {
     axiosMock.onGet(listTaxonomiesUrl).reply(200, { results: taxonomies, canAddTaxonomy: false });
-    const { findByRole, queryByText } = render(<RootWrapper />);
+    const { findByRole, queryByText } = render(<TaxonomyListPage />);
     // Wait until data has been loaded and rendered:
     await waitFor(() => { expect(queryByText('Loading')).toEqual(null); });
     const templateMenu = await findByRole('button', { name: 'Download template' });
     fireEvent.click(templateMenu);
-    const templateButton = await findByRole('link', { name: `${fileFormat} template` });
+    const templateButton = await findByRole('link', { name: `${fileFormat.toUpperCase()} template` });
     fireEvent.click(templateButton);
 
-    expect(templateButton.href).toBe(apiUrls.taxonomyTemplate(fileFormat.toLowerCase()));
+    expect((templateButton as HTMLAnchorElement).href).toBe(apiUrls.taxonomyTemplate(fileFormat));
   });
 
   it('disables the import taxonomy button if not permitted', async () => {
     axiosMock.onGet(listTaxonomiesUrl).reply(200, { results: [], canAddTaxonomy: false });
 
-    const { queryByText, getByRole } = render(<RootWrapper />);
+    const { queryByText, getByRole } = render(<TaxonomyListPage />);
     // Wait until data has been loaded and rendered:
     await waitFor(() => { expect(queryByText('Loading')).toEqual(null); });
     const importButton = getByRole('button', { name: 'Import' });
@@ -123,7 +93,7 @@ describe('<TaxonomyListPage />', () => {
   it('opens the import dialog modal when the import button is clicked', async () => {
     axiosMock.onGet(listTaxonomiesUrl).reply(200, { results: [], canAddTaxonomy: true });
 
-    const { getByRole, getByText } = render(<RootWrapper />);
+    const { getByRole, getByText } = render(<TaxonomyListPage />);
     const importButton = getByRole('button', { name: 'Import' });
     // Once the API response is received and rendered, the Import button should be enabled:
     await waitFor(() => { expect(importButton).not.toBeDisabled(); });
@@ -152,7 +122,7 @@ describe('<TaxonomyListPage />', () => {
       getByRole,
       getAllByText,
       queryByText,
-    } = render(<RootWrapper />);
+    } = render(<TaxonomyListPage />);
     // Wait until data has been loaded and rendered:
     await waitFor(() => { expect(queryByText('Loading')).toEqual(null); });
 
@@ -197,14 +167,19 @@ describe('<TaxonomyListPage />', () => {
       results: [{ name: 'Org2 Taxonomy C', ...defaults }],
     });
 
-    const { getByRole, getByText, queryByText } = render(<RootWrapper />);
+    const {
+      getByRole,
+      getByText,
+      queryByText,
+      findByRole,
+    } = render(<TaxonomyListPage />);
 
     // Open the taxonomies org filter select menu
     const taxonomiesFilterSelectMenu = await getByRole('button', { name: 'All taxonomies' });
     fireEvent.click(taxonomiesFilterSelectMenu);
 
     // Check that the 'Unassigned' option is correctly called
-    fireEvent.click(getByRole('link', { name: 'Unassigned' }));
+    fireEvent.click(await findByRole('link', { name: 'Unassigned' }));
     await waitFor(() => {
       expect(getByText('Unassigned Taxonomy A')).toBeInTheDocument();
     });
diff --git a/src/taxonomy/TaxonomyListPage.jsx b/src/taxonomy/TaxonomyListPage.tsx
similarity index 90%
rename from src/taxonomy/TaxonomyListPage.jsx
rename to src/taxonomy/TaxonomyListPage.tsx
index 6c6623614e..99eb7420c1 100644
--- a/src/taxonomy/TaxonomyListPage.jsx
+++ b/src/taxonomy/TaxonomyListPage.tsx
@@ -1,6 +1,4 @@
-// @ts-check
 import React, { useState } from 'react';
-import PropTypes from 'prop-types';
 import {
   Button,
   CardView,
@@ -31,7 +29,7 @@ import { ImportTagsWizard } from './import-tags';
 import messages from './messages';
 import TaxonomyCard from './taxonomy-card';
 
-const TaxonomyListHeaderButtons = ({ canAddTaxonomy }) => {
+const TaxonomyListHeaderButtons = (props: { canAddTaxonomy: boolean }) => {
   const intl = useIntl();
 
   const [isImportModalOpen, importModalOpen, importModalClose] = useToggle(false);
@@ -80,7 +78,7 @@ const TaxonomyListHeaderButtons = ({ canAddTaxonomy }) => {
         iconBefore={Add}
         onClick={importModalOpen}
         data-testid="taxonomy-import-button"
-        disabled={!canAddTaxonomy}
+        disabled={!props.canAddTaxonomy}
       >
         {intl.formatMessage(messages.importButtonLabel)}
       </Button>
@@ -93,6 +91,11 @@ const OrganizationFilterSelector = ({
   organizationListData,
   selectedOrgFilter,
   setSelectedOrgFilter,
+}: {
+  isOrganizationListLoaded: boolean;
+  organizationListData?: string[];
+  selectedOrgFilter: string;
+  setSelectedOrgFilter: (org: string) => void,
 }) => {
   const intl = useIntl();
   const isOrgSelected = (value) => (value === selectedOrgFilter ? <Check /> : null);
@@ -152,9 +155,9 @@ const OrganizationFilterSelector = ({
   );
 };
 
-const TaxonomyListPage = () => {
+export const TaxonomyListPage = () => {
   const intl = useIntl();
-  const [selectedOrgFilter, setSelectedOrgFilter] = useState(ALL_TAXONOMIES);
+  const [selectedOrgFilter, setSelectedOrgFilter] = useState<string>(ALL_TAXONOMIES);
 
   const {
     data: organizationListData,
@@ -242,22 +245,3 @@ const TaxonomyListPage = () => {
     </>
   );
 };
-
-TaxonomyListHeaderButtons.propTypes = {
-  canAddTaxonomy: PropTypes.bool.isRequired,
-};
-
-OrganizationFilterSelector.propTypes = {
-  isOrganizationListLoaded: PropTypes.bool.isRequired,
-  organizationListData: PropTypes.arrayOf(PropTypes.string),
-  selectedOrgFilter: PropTypes.string.isRequired,
-  setSelectedOrgFilter: PropTypes.func.isRequired,
-};
-
-OrganizationFilterSelector.defaultProps = {
-  organizationListData: null,
-};
-
-TaxonomyListPage.propTypes = {};
-
-export default TaxonomyListPage;
diff --git a/src/taxonomy/data/api.test.js b/src/taxonomy/data/api.test.ts
similarity index 75%
rename from src/taxonomy/data/api.test.js
rename to src/taxonomy/data/api.test.ts
index b287df0156..ed6ef8cdce 100644
--- a/src/taxonomy/data/api.test.js
+++ b/src/taxonomy/data/api.test.ts
@@ -1,8 +1,4 @@
-// @ts-check
-import MockAdapter from 'axios-mock-adapter';
-import { initializeMockApp } from '@edx/frontend-platform';
-import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
-
+import { initializeMocks } from '../../testUtils';
 import { taxonomyListMock } from '../__mocks__';
 
 import {
@@ -13,32 +9,14 @@ import {
   deleteTaxonomy,
 } from './api';
 
-let axiosMock;
-
 describe('taxonomy api calls', () => {
-  beforeEach(() => {
-    initializeMockApp({
-      authenticatedUser: {
-        userId: 3,
-        username: 'abc123',
-        administrator: true,
-        roles: [],
-      },
-    });
-
-    axiosMock = new MockAdapter(getAuthenticatedHttpClient());
-  });
-
-  afterEach(() => {
-    jest.clearAllMocks();
-  });
-
   it.each([
     undefined,
     'All taxonomies',
     'Unassigned',
     'testOrg',
   ])('should get taxonomy list data for \'%s\' org filter', async (org) => {
+    const { axiosMock } = initializeMocks();
     axiosMock.onGet(apiUrls.taxonomyList(org)).reply(200, taxonomyListMock);
     const result = await getTaxonomyListData(org);
 
@@ -47,6 +25,7 @@ describe('taxonomy api calls', () => {
   });
 
   it('should delete a taxonomy', async () => {
+    const { axiosMock } = initializeMocks();
     const taxonomyId = 123;
     axiosMock.onDelete(apiUrls.taxonomy(taxonomyId)).reply(200);
     await deleteTaxonomy(taxonomyId);
@@ -55,6 +34,7 @@ describe('taxonomy api calls', () => {
   });
 
   it('should call get taxonomy', async () => {
+    const { axiosMock } = initializeMocks();
     axiosMock.onGet(apiUrls.taxonomy(1)).reply(200);
     await getTaxonomy(1);
 
@@ -62,6 +42,7 @@ describe('taxonomy api calls', () => {
   });
 
   it('Export should set window.location.href correctly', () => {
+    initializeMocks();
     const origLocation = window.location;
     // @ts-ignore
     delete window.location;
diff --git a/src/taxonomy/data/api.js b/src/taxonomy/data/api.ts
similarity index 51%
rename from src/taxonomy/data/api.js
rename to src/taxonomy/data/api.ts
index a36cf6d513..60ad85b5c7 100644
--- a/src/taxonomy/data/api.js
+++ b/src/taxonomy/data/api.ts
@@ -1,15 +1,15 @@
-// @ts-check
 import { camelCaseObject, getConfig } from '@edx/frontend-platform';
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
+import type { TaxonomyData, TaxonomyListData } from './types';
 
 const getApiBaseUrl = () => getConfig().STUDIO_BASE_URL;
 const getTaxonomiesV1Endpoint = () => new URL('api/content_tagging/v1/taxonomies/', getApiBaseUrl()).href;
 /**
  * Helper method for creating URLs for the tagging/taxonomy API. Used only in this file.
- * @param {string} path The subpath within the taxonomies "v1" REST API namespace
- * @param {Record<string, string | number>} [searchParams] Query parameters to include
+ * @param path The subpath within the taxonomies "v1" REST API namespace
+ * @param searchParams Query parameters to include
  */
-const makeUrl = (path, searchParams) => {
+const makeUrl = (path: string, searchParams?: Record<string, string | number>): string => {
   const url = new URL(path, getTaxonomiesV1Endpoint());
   if (searchParams) {
     Object.entries(searchParams).forEach(([k, v]) => url.searchParams.append(k, String(v)));
@@ -20,14 +20,13 @@ const makeUrl = (path, searchParams) => {
 export const ALL_TAXONOMIES = '__all';
 export const UNASSIGNED = '__unassigned';
 
-/** @satisfies {Record<string, (...args: any[]) => string>} */
 export const apiUrls = {
   /**
    * Get the URL of the "list all taxonomies" endpoint
-   * @param {string} [org] Optionally, Filter the list to only show taxonomies assigned to this org
+   * @param org Optionally, Filter the list to only show taxonomies assigned to this org
    */
-  taxonomyList(org) {
-    const params = {};
+  taxonomyList(org?: string) {
+    const params: Record<string, string> = {};
     if (org !== undefined) {
       if (org === UNASSIGNED) {
         params.unassigned = 'true';
@@ -39,87 +38,74 @@ export const apiUrls = {
   },
   /**
    * Get the URL of the API endpoint to download a taxonomy as a CSV/JSON file.
-   * @param {number} taxonomyId The ID of the taxonomy
-   * @param {'json'|'csv'} format Which format to use for the export
+   * @param taxonomyId The ID of the taxonomy
+   * @param format Which format to use for the export
    */
-  exportTaxonomy: (taxonomyId, format) => makeUrl(`${taxonomyId}/export/`, { output_format: format, download: 1 }),
+  exportTaxonomy: (taxonomyId: number, format: 'json' | 'csv') => (
+    makeUrl(`${taxonomyId}/export/`, { output_format: format, download: 1 })
+  ),
   /**
    * The the URL of the downloadable template file that shows how to format a
    * taxonomy file.
-   * @param {'json'|'csv'} format The format requested
+   * @param format The format requested
    */
-  taxonomyTemplate: (format) => makeUrl(`import/template.${format}`),
-  /**
-   * Get the URL for a Taxonomy
-   * @param {number} taxonomyId The ID of the taxonomy
-   */
-  taxonomy: (taxonomyId) => makeUrl(`${taxonomyId}/`),
+  taxonomyTemplate: (format: 'json' | 'csv') => makeUrl(`import/template.${format}`),
+  /** Get the URL for a Taxonomy */
+  taxonomy: (taxonomyId: number) => makeUrl(`${taxonomyId}/`),
   /**
    * Get the URL for listing the tags of a taxonomy
-   * @param {number} taxonomyId
-   * @param {number} pageIndex Zero-indexed page number
-   * @param {*} pageSize How many tags per page to load
+   * @param pageIndex Zero-indexed page number
+   * @param pageSize How many tags per page to load
    */
-  tagList: (taxonomyId, pageIndex, pageSize) => makeUrl(`${taxonomyId}/tags/`, {
+  tagList: (taxonomyId: number, pageIndex: number, pageSize: number) => makeUrl(`${taxonomyId}/tags/`, {
     page: (pageIndex + 1), page_size: pageSize,
   }),
   /**
    * Get _all_ tags below a given parent tag. This may be replaced with something more scalable in the future.
-   * @param {number} taxonomyId
-   * @param {string} parentTagValue
    */
-  allSubtagsOf: (taxonomyId, parentTagValue) => makeUrl(`${taxonomyId}/tags/`, {
+  allSubtagsOf: (taxonomyId: number, parentTagValue: string) => makeUrl(`${taxonomyId}/tags/`, {
     // Load as deeply as we can
     full_depth_threshold: 10000,
     parent_tag: parentTagValue,
   }),
   /** URL to create a new taxonomy from an import file. */
   createTaxonomyFromImport: () => makeUrl('import/'),
-  /**
-   * @param {number} taxonomyId
-   */
+  /** URL to import tags into an existing taxonomy */
   tagsImport: (taxonomyId) => makeUrl(`${taxonomyId}/tags/import/`),
-  /**
-   * @param {number} taxonomyId
-   */
-  tagsPlanImport: (taxonomyId) => makeUrl(`${taxonomyId}/tags/import/plan/`),
-};
+  /** URL to plan (preview what would happen) a taxonomy import */
+  tagsPlanImport: (taxonomyId: number) => makeUrl(`${taxonomyId}/tags/import/plan/`),
+} satisfies Record<string, (...args: any[]) => string>;
 
 /**
  * Get list of taxonomies.
- * @param {string} [org] Filter the list to only show taxonomies assigned to this org
- * @returns {Promise<import("./types.js").TaxonomyListData>}
+ * @param org Optionally, filter the list to only show taxonomies assigned to this org
  */
-export async function getTaxonomyListData(org) {
+export async function getTaxonomyListData(org?: string): Promise<TaxonomyListData> {
   const { data } = await getAuthenticatedHttpClient().get(apiUrls.taxonomyList(org));
   return camelCaseObject(data);
 }
 
 /**
  * Delete a Taxonomy
- * @param {number} taxonomyId
- * @returns {Promise<void>}
  */
-export async function deleteTaxonomy(taxonomyId) {
+export async function deleteTaxonomy(taxonomyId: number): Promise<void> {
   await getAuthenticatedHttpClient().delete(apiUrls.taxonomy(taxonomyId));
 }
 
 /**
  * Get metadata about a Taxonomy
- * @param {number} taxonomyId The ID of the taxonomy to get
- * @returns {Promise<import("./types.js").TaxonomyData>}
+ * @param taxonomyId The ID of the taxonomy to get
  */
-export async function getTaxonomy(taxonomyId) {
+export async function getTaxonomy(taxonomyId: number): Promise<TaxonomyData> {
   const { data } = await getAuthenticatedHttpClient().get(apiUrls.taxonomy(taxonomyId));
   return camelCaseObject(data);
 }
 
 /**
  * Downloads the file of the exported taxonomy
- * @param {number} taxonomyId The ID of the taxonomy
- * @param {'json'|'csv'} format Which format to use for the export file.
- * @returns {void}
+ * @param taxonomyId The ID of the taxonomy
+ * @param format Which format to use for the export file.
  */
-export function getTaxonomyExportFile(taxonomyId, format) {
+export function getTaxonomyExportFile(taxonomyId: number, format: 'json' | 'csv'): void {
   window.location.href = apiUrls.exportTaxonomy(taxonomyId, format);
 }
diff --git a/src/taxonomy/data/apiHooks.js b/src/taxonomy/data/apiHooks.ts
similarity index 64%
rename from src/taxonomy/data/apiHooks.js
rename to src/taxonomy/data/apiHooks.ts
index 8b2037d390..f8856c86ba 100644
--- a/src/taxonomy/data/apiHooks.js
+++ b/src/taxonomy/data/apiHooks.ts
@@ -1,4 +1,3 @@
-// @ts-check
 /**
  * This is a file used especially in this `taxonomy` module.
  *
@@ -16,6 +15,7 @@ import { camelCaseObject } from '@edx/frontend-platform';
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 import { apiUrls, ALL_TAXONOMIES } from './api';
 import * as api from './api';
+import type { QueryOptions, TagListData } from './types';
 
 // Query key patterns. Allows an easy way to clear all data related to a given taxonomy.
 // https://github.com/openedx/frontend-app-admin-portal/blob/2ba315d/docs/decisions/0006-tanstack-react-query.rst
@@ -24,46 +24,46 @@ export const taxonomyQueryKeys = {
   all: ['taxonomies'],
   /**
    * Key for the list of taxonomies, optionally filtered by org.
-   * @param {string} [org] Which org we fetched the taxonomy list for (optional)
+   * @param org Which org we fetched the taxonomy list for (optional)
    */
-  taxonomyList: (org) => [
+  taxonomyList: (org?: string) => [
     ...taxonomyQueryKeys.all, 'taxonomyList', ...(org && org !== ALL_TAXONOMIES ? [org] : []),
   ],
   /**
    * Base key for data specific to a single taxonomy. No data is stored directly in this key.
-   * @param {number} taxonomyId ID of the taxonomy
+   * @param taxonomyId ID of the taxonomy
    */
-  taxonomy: (taxonomyId) => [...taxonomyQueryKeys.all, 'taxonomy', taxonomyId],
+  taxonomy: (taxonomyId: number) => [...taxonomyQueryKeys.all, 'taxonomy', taxonomyId],
   /**
-   * @param {number} taxonomyId ID of the taxonomy
+   * @param taxonomyId ID of the taxonomy
    */
-  taxonomyMetadata: (taxonomyId) => [...taxonomyQueryKeys.taxonomy(taxonomyId), 'metadata'],
+  taxonomyMetadata: (taxonomyId: number) => [...taxonomyQueryKeys.taxonomy(taxonomyId), 'metadata'],
   /**
-   * @param {number} taxonomyId ID of the taxonomy
+   * @param taxonomyId ID of the taxonomy
    */
-  taxonomyTagList: (taxonomyId) => [...taxonomyQueryKeys.taxonomy(taxonomyId), 'tags'],
+  taxonomyTagList: (taxonomyId: number) => [...taxonomyQueryKeys.taxonomy(taxonomyId), 'tags'],
   /**
-   * @param {number} taxonomyId ID of the taxonomy
-   * @param {number} pageIndex Which page of tags to load (zero-based)
-   * @param {number} pageSize
+   * @param taxonomyId ID of the taxonomy
+   * @param pageIndex Which page of tags to load (zero-based)
+   * @param pageSize
    */
-  taxonomyTagListPage: (taxonomyId, pageIndex, pageSize) => [
+  taxonomyTagListPage: (taxonomyId: number, pageIndex: number, pageSize: number) => [
     ...taxonomyQueryKeys.taxonomyTagList(taxonomyId), 'page', pageIndex, pageSize,
   ],
   /**
    * Query for loading _all_ the subtags of a particular parent tag
-   * @param {number} taxonomyId ID of the taxonomy
-   * @param {string} parentTagValue
+   * @param taxonomyId ID of the taxonomy
+   * @param parentTagValue
    */
-  taxonomyTagSubtagsList: (taxonomyId, parentTagValue) => [
+  taxonomyTagSubtagsList: (taxonomyId: number, parentTagValue: string) => [
     ...taxonomyQueryKeys.taxonomyTagList(taxonomyId), 'subtags', parentTagValue,
   ],
   /**
-   * @param {number} taxonomyId ID of the taxonomy
-   * @param {string} fileId Some string to uniquely identify the file we want to upload
+   * @param taxonomyId ID of the taxonomy
+   * @param fileId Some string to uniquely identify the file we want to upload
    */
-  importPlan: (taxonomyId, fileId) => [...taxonomyQueryKeys.all, 'importPlan', taxonomyId, fileId],
-};
+  importPlan: (taxonomyId: number, fileId: string) => [...taxonomyQueryKeys.all, 'importPlan', taxonomyId, fileId],
+} satisfies Record<string, (string | number)[] | ((...args: any[]) => (string | number)[])>;
 
 /**
  * Builds the query to get the taxonomy list
@@ -83,8 +83,7 @@ export const useTaxonomyList = (org) => (
 export const useDeleteTaxonomy = () => {
   const queryClient = useQueryClient();
   const { mutateAsync } = useMutation({
-    /** @type {import("@tanstack/react-query").MutateFunction<any, any, {pk: number}>} */
-    mutationFn: async ({ pk }) => api.deleteTaxonomy(pk),
+    mutationFn: async ({ pk }: { pk: number }) => api.deleteTaxonomy(pk),
     onSettled: (_d, _e, args) => {
       queryClient.invalidateQueries({ queryKey: taxonomyQueryKeys.taxonomyList() });
       queryClient.removeQueries({ queryKey: taxonomyQueryKeys.taxonomy(args.pk) });
@@ -93,10 +92,8 @@ export const useDeleteTaxonomy = () => {
   return mutateAsync;
 };
 
-/** Builds the query to get the taxonomy detail
-  * @param {number} taxonomyId
-  */
-export const useTaxonomyDetails = (taxonomyId) => useQuery({
+/** Builds the query to get the taxonomy detail */
+export const useTaxonomyDetails = (taxonomyId: number) => useQuery({
   queryKey: taxonomyQueryKeys.taxonomyMetadata(taxonomyId),
   queryFn: () => api.getTaxonomy(taxonomyId),
 });
@@ -107,20 +104,9 @@ export const useTaxonomyDetails = (taxonomyId) => useQuery({
 export const useImportNewTaxonomy = () => {
   const queryClient = useQueryClient();
   return useMutation({
-    /**
-    * @type {import("@tanstack/react-query").MutateFunction<
-    *   import("./types.js").TaxonomyData,
-    *   any,
-    *   {
-    *     name: string,
-    *     description: string,
-    *     file: File,
-    *   }
-    * >}
-    */
     mutationFn: async ({
       name, description, file,
-    }) => {
+    }: { name: string, description: string, file: File }) => {
       const formData = new FormData();
       formData.append('taxonomy_name', name);
       formData.append('taxonomy_description', description);
@@ -145,25 +131,15 @@ export const useImportNewTaxonomy = () => {
 export const useImportTags = () => {
   const queryClient = useQueryClient();
   return useMutation({
-    /**
-    * @type {import("@tanstack/react-query").MutateFunction<
-    *   import("./types.js").TaxonomyData,
-    *   any,
-    *   {
-    *     taxonomyId: number,
-    *     file: File,
-    *   }
-    * >}
-    */
-    mutationFn: async ({ taxonomyId, file }) => {
+    mutationFn: async ({ taxonomyId, file }: { taxonomyId: number, file: File }) => {
       const formData = new FormData();
       formData.append('file', file);
 
       try {
         const { data } = await getAuthenticatedHttpClient().put(apiUrls.tagsImport(taxonomyId), formData);
         return camelCaseObject(data);
-      } catch (/** @type {any} */ err) {
-        throw new Error(err.response?.data?.error || err.message);
+      } catch (err) {
+        throw new Error((err as any).response?.data?.error || (err as any).message);
       }
     },
     onSuccess: (data) => {
@@ -178,15 +154,12 @@ export const useImportTags = () => {
 
 /**
  * Preview the results of importing the given file into an existing taxonomy.
- * @param {number} taxonomyId The ID of the taxonomy whose tags we're updating.
- * @param {File|null} file The file that we want to import
+ * @param taxonomyId The ID of the taxonomy whose tags we're updating.
+ * @param file The file that we want to import
  */
-export const useImportPlan = (taxonomyId, file) => useQuery({
+export const useImportPlan = (taxonomyId: number, file: File | null) => useQuery({
   queryKey: taxonomyQueryKeys.importPlan(taxonomyId, file ? `${file.name}${file.lastModified}${file.size}` : ''),
-  /**
-  * @type {import("@tanstack/react-query").QueryFunction<string|null>}
-  */
-  queryFn: async () => {
+  queryFn: async (): Promise<string | null> => {
     if (!taxonomyId || file === null) {
       return null;
     }
@@ -195,26 +168,24 @@ export const useImportPlan = (taxonomyId, file) => useQuery({
 
     try {
       const { data } = await getAuthenticatedHttpClient().put(apiUrls.tagsPlanImport(taxonomyId), formData);
-      return /** @type {string} */(data.plan);
-    } catch (/** @type {any} */ err) {
-      throw new Error(err.response?.data?.error || err.message);
+      return data.plan as string;
+    } catch (err) {
+      throw new Error((err as any).response?.data?.error || (err as any).message);
     }
   },
   retry: false, // If there's an error, it's probably a real problem with the file. Don't try again several times!
 });
 
 /**
- * @param {number} taxonomyId
- * @param {import('./types.js').QueryOptions} options
- * @returns {import('@tanstack/react-query').UseQueryResult<import('./types.js').TagListData>}
+ * Use the list of tags in a taxonomy.
  */
-export const useTagListData = (taxonomyId, options) => {
+export const useTagListData = (taxonomyId: number, options: QueryOptions) => {
   const { pageIndex, pageSize } = options;
   return useQuery({
     queryKey: taxonomyQueryKeys.taxonomyTagListPage(taxonomyId, pageIndex, pageSize),
     queryFn: async () => {
       const { data } = await getAuthenticatedHttpClient().get(apiUrls.tagList(taxonomyId, pageIndex, pageSize));
-      return camelCaseObject(data);
+      return camelCaseObject(data) as TagListData;
     },
   });
 };
@@ -223,14 +194,11 @@ export const useTagListData = (taxonomyId, options) => {
  * Temporary hook to load *all* the subtags of a given tag in a taxonomy.
  * Doesn't handle pagination or anything. This is meant to be replaced by
  * something more sophisticated later, as we improve the "taxonomy details" page.
- * @param {number} taxonomyId
- * @param {string} parentTagValue
- * @returns {import('@tanstack/react-query').UseQueryResult<import('./types.js').TagListData>}
  */
-export const useSubTags = (taxonomyId, parentTagValue) => useQuery({
+export const useSubTags = (taxonomyId: number, parentTagValue: string) => useQuery({
   queryKey: taxonomyQueryKeys.taxonomyTagSubtagsList(taxonomyId, parentTagValue),
   queryFn: async () => {
     const response = await getAuthenticatedHttpClient().get(apiUrls.allSubtagsOf(taxonomyId, parentTagValue));
-    return camelCaseObject(response.data);
+    return camelCaseObject(response.data) as TagListData;
   },
 });
diff --git a/src/taxonomy/delete-dialog/messages.js b/src/taxonomy/delete-dialog/messages.ts
similarity index 100%
rename from src/taxonomy/delete-dialog/messages.js
rename to src/taxonomy/delete-dialog/messages.ts
diff --git a/src/taxonomy/export-modal/messages.js b/src/taxonomy/export-modal/messages.ts
similarity index 100%
rename from src/taxonomy/export-modal/messages.js
rename to src/taxonomy/export-modal/messages.ts
diff --git a/src/taxonomy/import-tags/ImportTagsWizard.jsx b/src/taxonomy/import-tags/ImportTagsWizard.jsx
index 7b3ff10df6..8a67fef46e 100644
--- a/src/taxonomy/import-tags/ImportTagsWizard.jsx
+++ b/src/taxonomy/import-tags/ImportTagsWizard.jsx
@@ -566,4 +566,4 @@ ImportTagsWizard.propTypes = {
   reimport: PropTypes.bool,
 };
 
-export default ImportTagsWizard;
+export { ImportTagsWizard };
diff --git a/src/taxonomy/import-tags/ImportTagsWizard.test.jsx b/src/taxonomy/import-tags/ImportTagsWizard.test.jsx
index bbf0d22028..b77dc045b5 100644
--- a/src/taxonomy/import-tags/ImportTagsWizard.test.jsx
+++ b/src/taxonomy/import-tags/ImportTagsWizard.test.jsx
@@ -17,7 +17,7 @@ import PropTypes from 'prop-types';
 import initializeStore from '../../store';
 import { getTaxonomyExportFile } from '../data/api';
 import { TaxonomyContext } from '../common/context';
-import ImportTagsWizard from './ImportTagsWizard';
+import { ImportTagsWizard } from './ImportTagsWizard';
 
 let store;
 
diff --git a/src/taxonomy/import-tags/index.js b/src/taxonomy/import-tags/index.js
deleted file mode 100644
index 031f798af0..0000000000
--- a/src/taxonomy/import-tags/index.js
+++ /dev/null
@@ -1,2 +0,0 @@
-// @ts-check
-export { default as ImportTagsWizard } from './ImportTagsWizard';
diff --git a/src/taxonomy/import-tags/index.ts b/src/taxonomy/import-tags/index.ts
new file mode 100644
index 0000000000..72f293f4b0
--- /dev/null
+++ b/src/taxonomy/import-tags/index.ts
@@ -0,0 +1 @@
+export { ImportTagsWizard } from './ImportTagsWizard';
diff --git a/src/taxonomy/import-tags/messages.js b/src/taxonomy/import-tags/messages.ts
similarity index 99%
rename from src/taxonomy/import-tags/messages.js
rename to src/taxonomy/import-tags/messages.ts
index 05f79659c5..1561c8a694 100644
--- a/src/taxonomy/import-tags/messages.js
+++ b/src/taxonomy/import-tags/messages.ts
@@ -1,4 +1,3 @@
-// @ts-check
 import { defineMessages } from '@edx/frontend-platform/i18n';
 
 const messages = defineMessages({
diff --git a/src/taxonomy/index.js b/src/taxonomy/index.js
deleted file mode 100644
index 356c532411..0000000000
--- a/src/taxonomy/index.js
+++ /dev/null
@@ -1,3 +0,0 @@
-export { default as TaxonomyListPage } from './TaxonomyListPage';
-export { default as TaxonomyLayout } from './TaxonomyLayout';
-export { TaxonomyDetailPage } from './taxonomy-detail';
diff --git a/src/taxonomy/index.ts b/src/taxonomy/index.ts
new file mode 100644
index 0000000000..17c09351c8
--- /dev/null
+++ b/src/taxonomy/index.ts
@@ -0,0 +1,3 @@
+export { TaxonomyListPage } from './TaxonomyListPage';
+export { TaxonomyLayout } from './TaxonomyLayout';
+export { TaxonomyDetailPage } from './taxonomy-detail';
diff --git a/src/taxonomy/manage-orgs/index.js b/src/taxonomy/manage-orgs/index.ts
similarity index 100%
rename from src/taxonomy/manage-orgs/index.js
rename to src/taxonomy/manage-orgs/index.ts
diff --git a/src/taxonomy/manage-orgs/messages.js b/src/taxonomy/manage-orgs/messages.ts
similarity index 99%
rename from src/taxonomy/manage-orgs/messages.js
rename to src/taxonomy/manage-orgs/messages.ts
index e7b13c7363..b422549815 100644
--- a/src/taxonomy/manage-orgs/messages.js
+++ b/src/taxonomy/manage-orgs/messages.ts
@@ -1,4 +1,3 @@
-// @ts-check
 import { defineMessages } from '@edx/frontend-platform/i18n';
 
 const messages = defineMessages({
diff --git a/src/taxonomy/messages.js b/src/taxonomy/messages.ts
similarity index 100%
rename from src/taxonomy/messages.js
rename to src/taxonomy/messages.ts
diff --git a/src/taxonomy/system-defined-badge/messages.js b/src/taxonomy/system-defined-badge/messages.ts
similarity index 100%
rename from src/taxonomy/system-defined-badge/messages.js
rename to src/taxonomy/system-defined-badge/messages.ts
diff --git a/src/taxonomy/taxonomy-card/messages.js b/src/taxonomy/taxonomy-card/messages.ts
similarity index 100%
rename from src/taxonomy/taxonomy-card/messages.js
rename to src/taxonomy/taxonomy-card/messages.ts
diff --git a/src/taxonomy/taxonomy-detail/index.js b/src/taxonomy/taxonomy-detail/index.ts
similarity index 84%
rename from src/taxonomy/taxonomy-detail/index.js
rename to src/taxonomy/taxonomy-detail/index.ts
index f379eb991b..0b27a5d2a5 100644
--- a/src/taxonomy/taxonomy-detail/index.js
+++ b/src/taxonomy/taxonomy-detail/index.ts
@@ -1,2 +1 @@
-// @ts-check
 export { default as TaxonomyDetailPage } from './TaxonomyDetailPage';
diff --git a/src/taxonomy/taxonomy-detail/messages.js b/src/taxonomy/taxonomy-detail/messages.ts
similarity index 98%
rename from src/taxonomy/taxonomy-detail/messages.js
rename to src/taxonomy/taxonomy-detail/messages.ts
index 922474216d..3aa7968399 100644
--- a/src/taxonomy/taxonomy-detail/messages.js
+++ b/src/taxonomy/taxonomy-detail/messages.ts
@@ -1,4 +1,3 @@
-// ts-check
 import { defineMessages } from '@edx/frontend-platform/i18n';
 
 const messages = defineMessages({
diff --git a/src/taxonomy/taxonomy-menu/index.js b/src/taxonomy/taxonomy-menu/index.ts
similarity index 81%
rename from src/taxonomy/taxonomy-menu/index.js
rename to src/taxonomy/taxonomy-menu/index.ts
index 9e5393396e..ca59b994a5 100644
--- a/src/taxonomy/taxonomy-menu/index.js
+++ b/src/taxonomy/taxonomy-menu/index.ts
@@ -1,2 +1 @@
-// @ts-check
 export { default as TaxonomyMenu } from './TaxonomyMenu';
diff --git a/src/taxonomy/taxonomy-menu/messages.js b/src/taxonomy/taxonomy-menu/messages.ts
similarity index 98%
rename from src/taxonomy/taxonomy-menu/messages.js
rename to src/taxonomy/taxonomy-menu/messages.ts
index 3a71118ccb..8e8daa8e74 100644
--- a/src/taxonomy/taxonomy-menu/messages.js
+++ b/src/taxonomy/taxonomy-menu/messages.ts
@@ -1,4 +1,3 @@
-// @ts-check
 import { defineMessages } from '@edx/frontend-platform/i18n';
 
 const messages = defineMessages({