If the 2020 tax return was being filed for a tax refund, it is to late to file as the refund will not be paid. If taxes are owed then you should file the 2020 return as soon as possible since penalties and interest will continue to accrue until the tax return is filed and the taxes paid.
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/
Scroll down to the bottom of the screen and on the section Your tax returns & documents. Click on the Year and Click on Download/print return (PDF)
If you used the desktop CD/Download editions installed on your computer, the only copy of your tax data file and any PDF's will be on the computer where the return was created. TurboTax does not store online any returns completed using the desktop editions.
The 2020 tax return can only be printed and mailed, it cannot be e-filed.
Go to this IRS website for the address for mailing, by state - https://www.irs.gov/filing/where-to-file-paper-tax-returns-with-or-without-a-payment
