Its only going to help you if you itemize your taxes. Most people do not unless you own a home. Also you can easily create your own excel spreadsheet that will do the same thing. We don't fly to that many places. You just look at where you did an overnight, and compare your per diem for that day to what the federal rate is for that city. You can then deduct the difference. LogtenPro has a per diem sheet in its report section.