I got the same 971 code and letter issued with the same date and all. However,
You will normally see code 971, right after the 570 one. TC 971 is the generic code for an IRS notice or letter that will provide more details on the issue or advise you of further IRS delays (e.g additional 60 day review) to review your situation.
From other postings - I have had these codes before many yrs and they always resolved for me within a week. Never been audited.
