I e-filed on 03/26/20 due to my job sending out W-2s late, my return was accepted on 03/27/20, and a few days after that I'd been checking WMR. Today the progress bar disappeared, and all I could see was text showing "Your return is still being processed, we will update when a refund date is available." Never saw this before, so I logged on to my IRS account and saw my due taxes from last year were cleared with a balance of 0.00, but 2019-2020 show N/A. When checking my account transcript it shows codes 570 and 971 Notice Issued. I did have to file an amended return for 2016 which I sent certified and was signed for by them on 02/14/20. The line 570 shows account under review and references my 2016 return showing a notice to verify non-filing dated today 04/14/20. It looks like they're holding my refund of $1342 saying I didn't send them my 2016 1040X after 4 years, but I still have the certified letter receipt with a signature. What can I do since I can prove I did my part, and needlessly held my refund?
