I've also had this problem. After double checking the AGI and resubmitting, same rejection. I checked my IRS transcript and the 2019 AGI is missing, just blank. I called the IRS and told them that I mailed in my 2019 taxes with a check payment for taxes due. They verified receipt of the check and stated that the 2019 mailed returns have not yet been processed therefore I should enter "0" in the AGI box. This did not work, rejected again.
This problem effects the stimulus payments as I have not received payment two and three yet. I claimed the credit on the 2020 return and the IRS owes me a refund so I am trying to efile and avoid a long wait by paper filing. If they have not yet processed the 2019 paper returns I can only imagine how long it will take them to catch-up and process the 2020 returns.
Next, I will try to eFile by editing my AGI in Turbotax and say that we did not file 2019 taxes and see what kind of mess that stimulates. I am currently waiting for a transmission verification at the time of this post. Good luck if you paper filed last year.
:30 minutes later...
Just received a message from TurboTax that my Federal return has been accepted, so if entering 0 into AGI does not do it, choose "edit AGI" and select "did not file a 2019 return" and see if it goes through. Good Luck.
