Learn about UI overpayments and how to request a non-fraud overpayment waiver. MyUI Claimant Portal.You can deduct a part of your medical and dental expenses, and amounts you paid for certain taxes, interest, contributions, and other expenses. To request an overpayment waiver, log in to check your claim status. Refund requests must be made within one (1) year or, in the case of taxes, three (3) years after the date of the payment of the tax or license fee.