I mailed my 2019 return in June of 2020. My check was cashed a few days later. It is March 2021 and IRS accounts site still saying I didn't file a return for 2019! So I tried to e-file my 2020 return today and IRS rejected because the agi (adjusted gross income) for 2019 that I was required to enter to verify my identity "didnt match" their records (of which there are none because they STILL haven't processed a return I submitted 9 months ago!
