Serving a penalty week and recouping an overpayment cannot be done in the same week. The notice will provide the tax type from which the overpayment originated and tax type to which it is being applied.This brief but important letter notifies a customer that he or she has overpaid you. It can serve as a very good customer relations letter. Forms and instructions for requesting a refund on City taxes, water bills, and other fines or fees. Request a refund for City taxes or water bills. Wage Tax refund requests must be submitted through the Philadelphia Tax Center. You don't need a username and password to submit a refund request. You must include your name, your SSN, and your mailing address. 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.