Ya'a teeh and welcome to the official Navajo Nation, Office of the Navajo Tax Commission (ONTC) website! The Office of the Navajo Tax Commission administers and audits seven taxes in the Navajo Nation, the largest Indian reservation in the United States.
Our mission is to promote tribal sovereignty by collecting tax revenues and to provide taxpayers quality service by helping them understand their tax responsibilities through fair and just application of Navajo tax laws.
New changes have come to ONTC. Welcome! Please refer to our Staff Directory for New Email Addresses.
Reminder January 15th Deadline
Public Ruling Healthy Foods Act
Timely Filing Page 9-10 1.146 Due Dates &Time Determination Section D.