To claim a refund, you must file an amended return within 3 years after the date you filed your original return or 2 years after the date you paid the tax. If an applicant has filed the short form (1040A or 1040EZ), the Lender will accept a letter from IRS verifying the filing status of the Applicant.The additional time, provided in Notice 202321, to file an amended return is automatic. The TreasurerTax Collector's Office will send any such letters to the address for claimant shown on the Claim Form. The Preliminary Claim. If you are claiming funds, please complete the following: Fill out both the Claim Affirmation Form and Claim for Reimbursement. Write to: Contra Costa CCD. All dependency override decisions are final and cannot be appealed at a higher level. If you were approved for a dependency override for 2016-2017 at Contra. Contra Costa County - Free Tax Sites.