How much does it cost to register my business for sales and use tax? There is no charge to register your business for sales and use tax. September 11, 2015 18:57 Related articles What are the registration requirements for getting a sales tax account number? How do I get a copy of my resale certificate? What is my business tax classification? Is a charge for labor subject to sales tax? I am a TN contracted vendor doing business with state government entities. I was told I need to provide a certificate of registration or proof of sales tax exemption. What do I do?