The Department of Revenue uses two-factor authentication when logging in to TNTAP. The first factor is the logon which is a unique username and password. The second factor is a six-digit code that is sent to the taxpayer after the taxpayer attempts to logon. This code is called an authentication code. When you sign up for TNTAP access, you choose whether your authentication code should be emailed, texted, or both. When selecting text, please choose the mobile carrier you use for your mobile phone.
When you login to TNTAP for the first time from a new device, you will enter your username and password. The next screen will display a message that says, "The browser you are logging on with is not recognized." To continue to your TNTAP account, click “Send Authentication Code” or “Send Authentication Text” to have the code sent to you. Please push this button only once. If you click the button more than one time, please use the newest code because prior codes will not be valid. If you have requested that the code be emailed to you, please leave this screen up while checking your email in another window so that the session is still up.
Enter the code that has been emailed or texted to you, depending on what you chose when you set up your logon.
When you have entered the code, you can select “Yes” or “No” to "Remember this Device”. Selecting “Yes” allows TNTAP to validate the device you are using and to sign on to the system using only a username and password from this device in the future. This should only be used for a trusted device, not a public one.
If you choose “No” to “Remember this Device”, you will need a new authentication code each time you login to TNTAP from the device.
Additionally, if you access your account using a different device, a new authentication code is required.