How Do I Write Return To Irs Letter . Irs notices come on official irs letterhead and follow a standard format. To whom it may concern: I received a letter from the IRS saying I filed a frivolous tax return from www.quora.com Write down the agent’s name, date and time of the call, documents you need to send, amounts either side agreed to pay, and due dates. (in home and business) go to the forms tab, then open form. I expect to find a job within six months and believe i would be able to pay the.