The application for the exemption under Tax Code Section 11.22 is Form 50-135, Disabled Veteran's or Survivor's Exemption Application (PDF). How apply for these exemptions?It's easy to file your exemption with HCAD (Harris Central Appraisal District). Simply fill out form VTR-272 complete with a photocopy of your proof of liability and in some cases, proof of current military orders. Texas offers a partial property tax exemption for partially disabled Veterans. Veterans with a service connected disability are encouraged to file an exemption application form to have their property taxes lowered. Complete the exemption form. You can use Texas Comptroller Form 50135 to apply for the Disabled Veteran's or Survivor's Exemption. Property tax bills are normally mailed out before October 20 of each year. The law requires the property owner to apply for an exemption in most circumstances.