TurboTax Military Edition. TurboTax created a software program specifically for military members. There is currently a free version for junior enlisted, and a discount for senior enlisted and officers. https://turbotax.intuit.com/personal-taxes/online/military-edition.jsp
Militaryonesource.com offers a free version of H&R Block At Home®. You must click the link directly from the MilitaryOneSource home page and be logged into your account. This version features one federal return and up to 3 state returns (good for military members who change state residency in a tax year). Visit their website and click the link on the center of the page.
Taxslayer.com offers 50% discounted state and federal e-filing for military personnel.