I'm still in the process of getting my 2019 and 2020 state refund and no problems with the federal. The states likes to play games too. I've received notices of them "correcting" my returns. They will play their games and they will try to intimidate you. In my case after having a lengthy phone call with an auditor she told me to file a 1040x for both years and if the amended returns didn't resolve the issue that I'm entitled to have a hearing. I look forward to that hearing if the day ever comes. As of today my 2020 refund was completed and my 2019 is still "in process".

I created a cover letter that I had notarized that effectively put them in a box and if it's ok with Dave I'll attach it here or pm you. Be patient. Let them test your resolve and show them that you will not bend no matter how long it takes. It's rewarding in the end and confidence comes with competence.

Cheers