If you would like to receive your overpayment as a refund, complete Lines 37 and 38. In order to process your refund, you must provide proof of all applicable payments resulting in the credit balance now showing on your account.A statement or letter from the company indicating: (1) Property Index Number, (2) taxpayer's name,. In this article, we'll show you how to write a refund request letter template that not only grabs attention but also persuades companies to act in your favor. Complete the Refund Request Form. Incomplete forms cannot be processed. Click here to search for any overpayments on your PIN. If we have identified an overpayment and request a refund, please mail the check along with a copy of the overpayment request letter we sent you. As you complete the process of filing a refund, please keep these important matters in mind.