Disabled Veteran or Survivor Exemption. 100 Percent Disabled Veteran Exemption (Tax Code Section 11.131(b)):.Exemptions can be filed online for many appraisal districts. Select your county below to take you to the online filing application. To verify your exemption benefits, you must submit a completed verification form. You must file an Application for Residential Homestead Exemption with the county appraisal district between January 1 and April 30 of the tax year. Complete the exemption form. Just look up the appraisal record on your County Appraisal District (CAD). Application for Alternative Veterans Exemption From Real Property Taxation.