We usually create our documents using the Microsoft Office suite. From there, we can save them as a PDF. How you do this is important though to keep the accessibility features intact and it automatically tags the document during the conversion.

To save as a tagged PDF from Word in Windows:

1. Click on File > Save as Adobe PDF.
2. In the pop-up dialog, click Options.
3. Ensure that the following option is checked: Enable Accessibility and Reflow with tagged Adobe PDF.
4. Make sure Convert Word Headings to Bookmarks is also selected.

To save as tagged PDF from Word in Mac:

1. Go to File > Save As.
2. In the File Format drop-down menu, select PDF.
3. Select the "Best for electronic distribution and accessibility" radio button.
4. Click Export.