If you completed the 2020 tax return using the TurboTax online editions you will need to download the 2020 tax data file to your computer and then browse to the location where it was download when you start a new 2021 tax return using the desktop edition.
To access your prior year online tax returns sign onto the TurboTax website with the User ID you used to create the account - https://myturbotax.intuit.com/
Scroll down to the section Your tax returns & documents. Click on the Year and Click on Download .tax file
