Tex. Tax Code § 151.103
(a) Except as provided by Section 151.052(d), a retailer engaged in business in this state who makes a sale of a taxable item for storage, use, or consumption in this state shall collect the use tax that is due from the purchaser and give the purchaser a receipt for the tax payment. When the amount of use tax is added:
Acts 1981, 67th Leg., p. 1552, ch. 389, Sec. 1, eff. Jan. 1, 1982.
Amended by Acts 1993, 73rd Leg., ch. 587, Sec. 12, eff. Oct. 1, 1993;
Acts 2001, 77th Leg., ch. 397, Sec. 2, eff. Sept. 1, 2001;
Acts 2003, 78th Leg., ch. 1310, Sec. 100, eff. July 1, 2004.
Acts 2007, 80th Leg., R.S., Ch. 1266 (H.B. 3319), Sec. 15(2), eff. September 1, 2007.