Property owners must submit their claim no later than January 12, 2025, to the claims administrator to receive their refund. 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. How do I request a refund? A. Fill out the Business Tax Refund Request form to request a refund from the City for an overpayment. For questions regarding an Overpayment Waiver, contact Unemployment Customer Service at 1-800-300-5616. Repay Your Overpayment. The salary overpayment resulted because . Property owners can call 18334931547 for more information or to request a claim form if they don't receive one in the mail. Contact the Benefit Overpayment Collection Section at 1-800-676-5737 during normal business hours of 8 a.m.