You can find the CP or LTR number on the right corner of the letter. This page briefly explains why the Michigan Department of Treasury contacted you.Letter 6475 helps EIP recipients determine if they're eligible to claim the Recovery Rebate Credit on their 2021 tax year returns. This session covers the process of preparing and submitting proposals using the eResearch Proposal Management (eRPM) system. This questionnaire may be included with your letter to request information on all income received for a specific tax year. Access IRS forms, instructions and publications in electronic and print media. We have provided sample letters that you can use to request waivers of several different types of IRS penalties. Determine what tax year are they inquiring about. The tax year should be in the upper right hand corner of the letter. Then fill them out and mail them to the appropriate address listed below.