Texas News Back-To-School Sales Tax Holiday Set to Begin KWBU | By Will Burney Published August 10, 2018 at 2:59 PM CDT Twitter LinkedIn Email Listen • 2:06 Johnathan Garcia / Flikr Creative Commons State sales tax holiday on school supplies is Aug. 10-12. This weekend, Texas shoppers can buy school supplies and clothing items that sell for under $100, free of state sales tax.