Can I register my new business on TNTAP? Yes. If you have never been registered in Tennessee, please go to TNTAP and click “Register a New Business” under the Registration heading. May 27, 2018 14:42 Related articles How do I register for sales and use tax? What information do I need to create a TNTAP login or gain access to an account in TNTAP? How do I get a Tennessee Sales and Use Tax Certificate of Resale? What are the registration requirements for getting a sales tax account number? What can I do on TNTAP?