As a member of the military, not all of your pay and benefits are subject to tax.
Military members and their families don't pay tax on living allowances, the value of provided quarters, dependent care assistance programs, or combat pay, among other things.
You may also have more time to file as a member of the military.
If you or your spouse is on duty outside the U.S. or in Puerto Rico, you have an extra two months to file - without even filing for an extension. You can still get an additional four months to file if you file for an extension via Form 4868. If you are in a combat zone, you receive even more extra time to file - generally your return is due 180 days after your last day in a combat zone or your last day in a hospital for injuries sustained in a combat zone.