DOB NOW filing fee screen. Line 15 — The Tax Department will automatically refund any overpayment of gift tax.Table A - Tax Rate Schedule. 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. They can chase you in court and nab a tax return (even nab your money out of the bank). Our document template is designed to make the process of writing an "Inform a Customer of an Overpayment" letter quick, easy, and stress-free. Call 311 or 212-NEW-YORK (212-639-9675) for help. To make a payment or apply for a payment plan, visit the online payment portal today through UIS. Students can login to their personal UIS account.