: It is no longer possible to e-file a 2021 return; any filings or amendments for that year must now be printed and mailed to the IRS.
: Users during this cycle reported issues with the Cares Act charitable cash contributions (Line 12b), which required manual form deletions or specific software updates to correct "Smart Check" errors. Current Status of the 2021 Version Intuit TurboTax 2021 R12 - 2021.47.12.68
: If you have a .tax2021 file, it can only be opened by the 2021 desktop software; newer versions will not open it, though they can import its data for a new return. : It is no longer possible to e-file
As of early 2026, Intuit has discontinued active support for the 2021 software: newer versions will not open it
The release of Intuit TurboTax 2021 R12 (version 2021.47.12.68)