Posting the strategy from Efile Rejections on 2020 joint return (after about 15 Attempts) that worked for me . Since this error code sugg a discrepancy with my wife's ID information, I tried all suggestions I could find, including entering '0' or blank for AGI. I went to Forms mode in TT and on the Pers Info worksheet, blanked out last year Pins and the pins for this year. I checked the IRS transcripts for 2019 that showed our AGI info for our joint return was CORRECT THE ENTIRE TIME.
Finally, in the EFile steps, I said my wife DID NOT file a return last year and reentered both PINs for this year. ACCEPTED!
Clearly the IRS Database does NOT MATCH the transcript information, which means they are causing this problem, not us. Instead of addressing it, the solutions regularly mentioned are to check OUR INFORMATION as WE MUST HAVE MADE A MISTAKE. Nope. Hope this helps someone.
