Solved
IRS has not processed our 2019 return. We filed by mail. They received and cashed our check, but have not processed the return. Now our 2020 efile is rejected because there is no 2019 AGI on record. Is there a workaround? Prefer not to have to mail again because of all the backlog issues.
Try using a 0 for the 2019 AGI and e-file again.
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