State law currently makes possession of a suppressor illegal unless you have an NFA license. The new law will dispense with that and as long as the suppressor is "Made in Texas" according to the rules of the law, state and local law enforcement should leave you alone. However, the feds could still arrest and prosecute you if you don't have the NFA tax stamp/license and you actually build/buy the suppressor.
There is no NFA license. You pay a tax for the privilege of owning one. Its a tax stamp. If a law enforcement officer wants to see you tax stamp, politely tell him no, it a tax document unless he's a Treasury agent.