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). It is the responsibility of the DPR to notify and review the overpayment letter with the employee.• Log into INFORMS. Report an overpayment. Complete an overpayment refund form to notify First Coast of an overpayment prior to receiving a demand letter. An overpayment can happen if there is an ineligibility notice, which disqualifies a claimant in certain cases where they have already received benefits. If Shared Services is not notified, the overpayment will continue. All applications for refund must contain: • A detailed explanation of how the refund amount was computed;. • The specific reason(s) for the refund request;. Once the Cost Containment Unit (CCU) has reviewed the overpayment, you will receive a letter explaining the details of the reconciliation.