You can find the CP or LTR number on the right corner of the letter. You can get in-person help at your local IRS Taxpayer Assistance Center.Call for an appointment after you find a Taxpayer Assistance Center near you. Did you receive IRS Letter 725-B? Find out all you need to know about it in this video! In this article, we will provide you with a detailed guide on the steps involved in writing a letter to the IRS. To schedule an appointment, call 844-545-5640. First things first, taxpayers will need to call 8445455640 to schedule an appointment. Sample Original Letter: This is mailed with original Form 1095Bs for a given tax year. Sending an IRS audit reconsideration request?