The sales tax exemption rules are a bit more complex in Texas. Qualifying disabled vets are exempt from the 6.25% state sales tax only on private party vehicle purchases, not from dealers. To be eligible, you need one of these VA disability ratings: Loss or paralysis of at least one lower extremity.
Veterans who receive compensation from the VA for a service-connected 100% total and permanent disability rating or of individual unemployability are eligible for 100% property tax exemption on their homestead.
There are multiple ways to file a Homestead Exemption application Form 50-114, however the online option is the fastest, and details are provided in the transcript below.