For general information on the IRS and military service, check the military page of the IRS Web site.  A link from this page is Tax Information for Members of the U.S. Armed Forces, which has additional links to all of the topics listed below and more:

• Questions and Answers on Combat Zone Tax Provisions: (questions and answers that discuss pay exclusions and deadline extensions)
• Combat Zone E-Mail Addresses: (alerts the IRS that a member of the military is serving in a combat zone)                           
• IRS Publication 3, Armed Forces' Tax Guide: (addresses a wide range of tax issues that may affect military)
• Reservists, Enlistees May Get Deferral for Back Taxes: Tax Tip 2005-40

• Military Family Tax Relief Act of 2003: (tax breaks related to military service, including two provisions that may require amended returns)