Can IRP registrations be processed through the mail or electronically? Yes, the easiest way to do your registration is online through the Tennessee Taxpayer Access Point (TNTAP). Forms are available here. July 16, 2018 20:35 Related articles How do I renew my IRP account? How do I open a new IRP account? How do I add a truck to my IRP account? What types of payments are accepted for IRP? If a new vehicle is purchased, can the IRP registration be transferred?