Where is the "tax home" page? It does not appear in my menu on the left.

Under the TurboTax logo.

The "tax home" and "documents" links only appeared after I partially finished my 2021 return.

This is annoying because this makes amending a previous year return contingent upon starting a current year return.  My intent was to amend a previous year return, not start 2021's. 

Did you use TurboTax to file your return in 2021 for the 2020 tax year? If so you can follow the instructions here to amend your return. 

If you did not use TurboTax to file your return, you would have to recreate your return in TurboTax in order to file the amended return, which would have to be mailed. 

If you need assistance filing the amended return, please click here to contact customer support.