Even if the two companies were incorporated in different states, like Delaware and Nevada?......................
In a deposition:
IRS: Mr. T, with respect to your Texas Company A, and this Delaware Company B, please explain in great detail your involvement with each company and take as much time as you need. We have all day and remember you are UNDER OATH and your SWORN testimony is being video taped.
Meanwhile, the IRS attorneys elbow is resting on a file full of emails, cell phone records of texts and phone calls, legal filings, private investigation reports, employee depositions, credit card records, bank records, photos etc etc.