Click here for Application for Additional Exemption for Veterans Age 65 and over with a combat-related disability (DR-501DV). Service-connected totally and permanently disabled veteran or veteran's surviving spouse.Next, follow the instructions on each section of the form carefully. Copy of honorable discharge papers (example: DD Form 214). • Copy of the rating decision letter from the US Department of Veterans Affairs. Applicants must meet requirements as of January 1. The deadline to file an application is March 1. Of the disability that is combat related, if not included in the rating decision letter. • Proof of age 65 as of January 1 of current tax year. Review immigration information in STEP 1.