The main reason your filing gets rejected even though the AGI matches you listed matches last year’s AGI is because the IRS is millions of flings behind and has not yet recorded your AGI. When I got mine rejected, I checked the IRS website where you can get a transcript of last year's taxes and found that although they had a transcript of my 2019, it said N/A (not available) for 2020. I then went and listed 0 as my AGI on my TurboTax filing. I submitted it and still got it rejected. However, when I looked closely, I saw that the description said that the IRS could not match my wife’s AGI. We file our taxes jointly and although I had changed my AGI to 0, I failed to change my wife’s AGI to 0 as well. I then went ahead and changed here AGI to 0 and VOILA! My filing got accepted! If you want to check your transcript on the IRS website, here is the link. Get Transcript | Internal Revenue Service (irs.gov)
