IFTA ? it's full name is International Fuel Tax Agreement. This organization is controlling the amount of fuel tax in different states in USA. This kind of payment have to be paid by every transportation firm in USA and in some of Canadian districts. Documents connected with fuel tax should be prepared by these companies and they have to be free from mistakes. There are many methods that can help to deal with the problem of such documents and mistakes. In next text there will be information about IFTA software.