If you are a veteran of the Texas National Guard, you do qualify for the veteran fee waiver as long as you have a DD-214 or NBG-22.
As per the Texas Veterans Commission, the fee waiver applies to veterans of:
US Army
US Navy
US Marine Corps
US Air Force
US Coast Guard
Texas Army National Guard
Texas Air National Guard
Unfortunately, veterans of the Texas State Guard don’t qualify for the fee waiver. And veterans of other state National Guards aren’t eligible, either.