We have provided sample letters that you can use to request waivers of several different types of IRS penalties. Address the letter to the IRS and include your name, address, and taxpayer identification number (TIN).Clearly State Your Request for Penalty Waiver. This guide provides a sample letter to IRS to waive penalty which will help you present your case and request relief from penalties. You may qualify for penalty relief if you tried to comply with tax laws but were unable due to circumstances beyond your control. Step 1: Complete the taxpayer information section. We ask for the information on this form to carry out the Internal Revenue laws of the United States. A. Administrative Forms. 1. Once you fill out the application, mail or fax it back to the company. â–¡ on the plan's website.