How do I open a new IRP account? You can register for an IRP account online through the Tennessee Taxpayer Access Point (TNTAP). Click here for step-by-step instructions on how to create a TNTAP logon. You can also open a new account using paper forms, by clicking here. July 16, 2018 20:55 Related articles Can IRP registrations be processed through the mail or electronically? Is a USDOT number required prior to registering for IRP? I have questions about IFTA and filing my return. Who should I contact? When filing IRP or IFTA, can I make a payment online? If a new vehicle is purchased, can the IRP registration be transferred?