How do I get a username and password to file business tax online? Business tax can now be filed in TNTAP. Click here for help creating a TNTAP logon. July 27, 2018 03:13 Related articles Creating a TNTAP logon TNTAP: Filing a Business Tax Return Are interest and dividends received from virtual currencies subject to Hall income tax? What information do I need to create a TNTAP login or gain access to an account in TNTAP? Who must pay business tax?