@briandsmith - my advice: have patience..... the IRS is woefully understaffed and literally 8 million paper filed tax returns, mainly from 2021, have yet to be processed. Be thankful you were able to get someone on the phone to talk to. From what I've read the agents on the phone don't know anything beyond what is on the transcripts or the where's my refund app.
write a letter detailing your conversations and your arguement on why the adjustment needs to occur in your favor.
how signficant are we talking? is it worth a lawyer and the costs of the lawyer.
have you contacted the advocate office?
https://www.irs.gov/government-entities/indian-tribal-governments/itg-faq-13-answer-what-is-the-taxp....
