What Motor Carrier functions can I do online through TNTAP? See the chart below. July 12, 2018 21:08 Related articles Can a customer still file manually and not use TNTAP? Will TNTAP replace the old system for IRP for doing things such as transfers, renewal and supplements? How do I open a new International Fuel Tax Agreement account? Which tax types are available in TNTAP? Can I file my IFTA return online?