You can find the CP or LTR number on the right corner of the letter. To schedule an appointment, call 844-545-5640.You can deduct a part of your medical and dental expenses, and amounts you paid for certain taxes, interest, contributions, and other expenses. Final determination letter received from the Internal Revenue Service in regards to your identity theft claim. The License and Revenue Division assists businesses in the City of Montgomery when issuing and maintaining appropriate business licenses and sales tax numbers. After completing the classes, the applicant can submit their application form with supporting documents to the MPDU Application Portal. For more information on obtaining a letter of determination from IRS, visit the IRS Web site. 15. I need assistance in completing forms such as the Rent Rebate application, where should I call? If your organization's Letter of. Intent is approved, you will receive an email notification inviting your organization to fill out the full application.