2019 GAS-1278 International Fuel Tax Agreement (IFTA) Fuel Tax Rates IFTA Fuel Tax Rates for 2019 Returns Documents Gas 1278 4th Quarter 12 16 19 web v1 Final Gas 1278 3rd Quarter 9 11 19 web v2 Final Gas 1278 2nd Quarter 6 17 19 web v4 Final Gas 1278 1st Quarter 3 18 19 web v2 Final Related Content GAS-1276 International Fuel Tax Agreement (IFTA) Return