Hell, I filed and paid 2019 last March and have the return receipt and canceled checks to prove it. Still not showing as processed. Has screwed us out of part of last year’s and me the latest economic impact payments. (Ironically, my wife got the latest but not me...we filed jointly!) In addition, it was about to screw us out of a chunk of our social security in 2021 but through a mighty effort on my part and a functioning Social Security office that got fixed just in the nick of time.
I got my refund from my March filed return about 3 weeks ago.