It was fairly formal, but the auditor was friendly and professional. My return was flagged as part of an IRS program to audit the forms and overall tax collect

It was fairly formal, but the auditor was friendly and professional. My return was flagged as part of an IRS program to audit the forms and overall tax collection effectiveness, so there was never any presumption that I'd tried to evade paying taxes. I sent over a bunch of documentation and then eventually met with the auditor at the office for a few hours to finalize things.