This is from Texas Penal Code. It covers it being registered, which is what the tax stamp is, so I would recommend keeping a copy of the stamp readily available in case it’s needed. But again those of us who go through the paperwork and pay for the stamp are law abiding citizen and not likely to ever have an issue.
Sec. 46.05. PROHIBITED WEAPONS.
(a) A person commits an offense if the person intentionally or knowingly possesses, manufactures, transports, repairs, or sells:
(1) any of the following items, unless the item is registered in the National Firearms Registration and Transfer Record maintained by the Bureau of Alcohol, Tobacco, Firearms and Explosives or otherwise not subject to that registration requirement or unless the item is classified as a curio or relic by the United States Department of Justice:
(A) an explosive weapon;
(B) a machine gun; or
(C) a short-barrel firearm;
(2) armor-piercing ammunition;
(3) a chemical dispensing device;
(4) a zip gun;
(5) a tire deflation device;
(6) a firearm silencer, unless the firearm silencer is classified as a curio or relic by the United States Department of Justice or the actor otherwise possesses, manufactures, transports, repairs, or sells the firearm silencer in compliance with federal law; or
(7) an improvised explosive device.