A claim for refund is a request for reimbursement of amounts previously paid. Generally, if you have paid your balance in full you will file a formal claim.You may file a claim for refund using CDTFA's online services. To submit a claim for refund, simply login using your username and password. In this video we will show you how to file a claim for refund. Fill out the request for a refund letter addressed to the Orange County Superior Court on your company's letterhead. You must include your contact information in your letter along with the business's address and your contact information for the reimbursement. Include details about the transaction. CalSTRS a written request to cancel your refund. Follow the directions on your letter, it includes all the information you need to respond.