Zero (0) AGI worked for me; federal return was just accepted. My return was rejected several times, even though I was using the correct AGI from 2019 tax transcript. Other members suggested this could be a timing issue with IRS records from 2019, so I used a zero for AGI (instead of the actual AGI) and the tax return was accepted (5/18/21).
FYI, although I had e-filed the 2019 return, we were notified of a missing form that we had to mail; maybe this took the tax return off-line. Strange, though, since the IRS clearly has the correct AGI on the 2019 tax transcript.
Thank you to everyone who explained WHY a zero could be the solution. Without an explanation it just feels like entering a wrong number on a tax return!
