@bbxrider -
if you signed up for an IRS PIN< you can't efile with it. the only alternative is to paper file./ You can guess the AGI as many times as you want but even if you get it right and don't have the PIN, you still have to efile.
try zero for the AGI - the IRS may have loaded the table before your 2020 tax return was processed so it's a zero in the table.
https://www.irs.gov/identity-theft-fraud-scams/retrieve-your-ip-pin
