It might seem strange, but by entering your layovers you are actually writing off meals while at work. The IRS allows pilots and flight attendants (and other traveling professions) to write of meals (M&IE) while traveling for their job, but rather than using actual meal expenses, federal per diem rates are used instead.
This video will explain that much better: http://www.youtube.com/watch?v=c9BLxnDXAeA
EZPerDiem helps pilots and flight attendants with their flight crew taxes by:
If you do not benefit, we will provide a 100% refund!