An overpayment can happen if there is an ineligibility notice, which disqualifies a claimant in certain cases where they have already received benefits. To request a tax refund, file an Application for Refund - Sales and Use Tax (Form DR-26S) or Application for Refund - All Other Taxes (Form DR-26).Submit this completed form with all refund checks and supporting documentation to ensure the overpayment refund is processed timely. The salary overpayment resulted because . The demand letter will include an attachment that will provide the original claim number, beneficiary name,. Please download the form, complete each field and print. Include the form with your refund so we can properly apply the refund and record the receipt. Oracle Must Return Overpaid Florida Taxes to Customers to Get Refund.