To file your IFTA fuel tax reports, you have to keep track of where you drove, how many miles you drove, fuel receipts or fuel tickets, and odometer readings. You have to file for IFTA four times a year, and you have to keep the records on file for four years. They’re due on January 31, April 30, July 31, and October 31. You can also send us your trip sheets, and we’ll do your fuel tax reports for you.