In the Create Request form choose Refund Request or Advance Aid under Request type. Complete the required fields and hit Submit.We have identified the following overpayment and are in good faith voluntarily refunding all monies collected in error. Refund Letter Format: Requesting someone for the refund of your amount paid? The salary overpayment resulted because . This form is for general instructions that apply to all corporation tax forms. It includes a variety of topics about how to fill out your form.