How do I apply for an IRP refund? You can submit a request online through the Tennessee Taxpayer Access Point (TNTAP) or submit a refund request to the motor carrier section unit at email@example.com. July 19, 2018 21:13 Related articles Can I receive a refund for the unused portion of my motor vehicle registration? How do I open a new IRP account? Can IRP registrations be processed through the mail or electronically? What is a Hunter's permit? How do I transfer a truck plate?