You should probably consult a tax professional for this scenario.
See https://taxexperts.naea.org/expertdirectory
Note that tax years prior to 2020 are closed (3-year SOL) for refunds and also (generally) closed for audits except in unusual cases (e.g., understating income by more than 25%) if you filed timely returns. Regardless, it would be best to consult a tax professional.
