Try telling the IRS that you won’t give them any information due to your privacy and see how that works out for you...
Never talk to an IRS agent. 5th Amendment. It works. Make them prove you owe money.
First question to ask is, “What is the statute requiring me in my situation to pay income taxes? Not any IRS regulation; a statute. Regulations are not laws.
Did this over 20 years ago and haven’t heard anything back from the IRS.