We have provided sample letters that you can use to request waivers of several different types of IRS penalties. The following pages contain templates to request penalty abatement on behalf of your clients when certain criteria are met.Individuals can generally use IRS Form 843 to request this type of IRS penalty abatement. This guide provides a sample letter to IRS to waive penalty which will help you present your case and request relief from penalties. Use IRS Form 843 to request penalty abatement. In this article we tell you what you need to do to have your request approved. The Illinois Department of Revenue (IDOR) sends letters and notices to request additional information and support for information you report on your tax return. How to request penalty relief. Follow the instructions in the IRS notice you received. For answers to employment tax questions, call the Business and Specialty Tax Line at 8008294933 (tollfree).