2020 GAS-1278 International Fuel Tax Agreement (IFTA) Fuel Tax Rates IFTA Fuel Tax Rates for 2020 Returns Documents Gas 1278 4th Quarter 12 9 20 web v1 Final Gas 1278 3rd Quarter 9 10 20 web v1 Final Gas 1278 2nd Quarter 6 10 20 web v1 Final Gas 1278 1st Quarter 3 19 20 web v2 Final Related Content GAS-1276 International Fuel Tax Agreement (IFTA) Return