Example audit letters from the IRS and state taxing agencies. Dealing with IRS mortgage interest audit letters can be confusing for many homeowners.At DimovTax, we offer straightforward and expert advice to help you. An Initial Contact Letter is your notification that your tax return has been selected for an audit (also called an examination). Tax audit letters will include your name, tax ID number or Social Security number, employee ID number, address and contact information. Sending an IRS audit reconsideration request? If you received a letter from the IRS, don't ignore it. Follow the directions on your letter, it includes all the information you need to respond.