I need to print the Fixed Assets Schedule used for my 2020 tax return, but it is not a part of the return itself, how can I access this schedule?

The Depreciation and Amortization Report will be included when you use Print Center and the option for all worksheets.

To access your current or prior year online tax returns sign onto the TurboTax website with the User ID you used to create the account - https://myturbotax.intuit.com/

When you sign onto your online account and land on the Tax Home web page, scroll down and click on Add a state. 

This will take you back to the 2020 online tax return.

Click on Tax Tools on the left side of the online program screen.  Then click on Print Center.  Then click on Print, save or preview this year's return.  Choose the option Include government and TurboTax worksheets