If you are using the TurboTax desktop CD/Download editions for tax year 2021 and used the desktop editions for completing a 2020 tax return, you do NOT sign onto an online account.
The 2020 tax data file on your computer has a file extension of .tax2020 and is stored, by default, in the TurboTax folder in the Documents directory, When you start a New Tax Return the program looks for the prior year tax data file in the TurboTax folder. If it is not stored in the folder then you need to Search of the data file on your computer, local drives, network drives and/or on USB drives.
