TurboTax® Free Military Taxes & Tax Preparation, Tax Filing for Active Duty Military and Reserves for $0 + free shipping
For a limited time Intuit is offering TurboTax Military Edition at no charge for paygrades E-1 to E-5. Retired, National Guard, Reeserves, and Active Duty are all included. I'm not sure when this expires, but it is currently free. It is normally $29.99 or the same price as their Deluxe Edition.
State and Federal e-filing is included for free as well.
$24.99 For E-6 and above. ($5 off)