The Federal Excise Tax returns are reported at the end of a quarterly with the IRS through the Tax Form 720. This excise tax return is now due for the 1st Quarter of 2018, April 30th is the last date to report it. You could prepare and report it online through http://TaxExcise.com, the only website that supports electronic filing for all the federal excise tax returns.
Along with the Federal Excise Tax returns, IFTA Fuel Tax returns reports on your heavy motor vehicles for the 1st Quarter is also due in this April, 30. Prepare it online, print them to file it manually with your state authorities.