TurboTax offers free military filing for active duty and reservists in the enlisted pay grades. In the "My Info" section be sure to answer all the military questions including rank/pay grade. Next, in the "Wages & Income" section enter the military form W2 being sure that you select "Active Military Pay" on the follow on page about "Uncommon Situations". Then continue your return and the filing process. Any discounts will be applied during the filing interview.
Here is a link with more information on the Military Free File program.