I want to use a Google document that will let me put a table of contents with each item linked to the section referred to - and then add a "back to the top" link under each completed section.

Just like "anchors" in an html page.

Can I do that in a Google Document? I've not found the answer using the Google Docs help.

Thanks!

Google Docs is blocked at work :confused: but I think your answer lies in the first search result here:
google docs anchors - Google Search

Aah, so they call them bookmarks. Thanks NK!

You're welcome.
Research is my thing. Plus I always learn something new along the way.