Junkman
Super Member
They give you a certificate so you don't have to charge them tax, however, you still have to pay tax on the fuel that is used in the machines that are doing the work. If the school busses are privately owned and are contracted to the school department, the fuel would be taxed. If the busses are owned and operated by the school department, then the fuel wouldn't be taxed. The question that has yet to be asked or answered is "who owns the school busses?".