IRS Publication 463 contains all the rules and regulations for deducting business travel, entertainment, gift, and car expenses. For flight crews, IRS Publication 463 is probably the most cited tax publication that the IRS has published because it provides information on accurate recordkeeping, and how to report travel expenses (the proper use of per diem rates with regard to deducting meals and incidental expenses and the special rate for transportation workers). The guidelines described in IRS Publication 463 help pilots and flight attendants with all of their employee business expenses including the popular and lucrative per diem deduction.  The data within IRS Publication 463 applies to flight crews who itemize their tax returns. IRS Publication 463 is not the only tax publication that flight crews should reference. IRS Publication 529, IRS Publication 1542, and several tax forms such as IRS Form 2106 are all very important.