Beginning Jan. 1, 2012, a person claiming an exemption from sales tax on the purchase of certain items used in the production of agricultural and timber products must provide an Ag/Timber registration number issued by the Comptroller of Public Accounts on the exemption certificate issued to the seller. You need a number if you: 1) are engaged in the production of agricultural or timber products for sale; and, 2) claim an exemption from Texas sales tax on the purchase of certain items used in the production of agricultural… Read More →