I have, but only by phone to provide a few docs and explanations. Never a field audit, where they come knocking on your door.

The dems say the 87,000 new IRS folks are to audit the billionaires and not those making under $400K/year

With about 735 Billionaires in the US now and 87,000 new IRS people getting hired, thats around 118 new IRS people to audit each billionaire. While Im sure an audit of any of them might take multiple people, 118 sounds unbelievable.
https://www.forbes.com/billionaires/

Pretty much guaranteed they will be turned loose against the middle class, especially small business owners. The billionaires can afford to hire a small army of lawyers and accountants to protect them, but not the small business owners or entrepreneurs. Already have seen the IRS politicize their operation for years. Whats the chance it becomes used as a form of political oppression?