Here's how to get it.
1.) Go to http://public.militaryonesource.mil/taxprep and register for a Military OneSource Account
2.) After you've registered, It should automatically direct you to the H&R Block Website. If set up correctly you should see the MilitaryOneSource logo on the top right corner (see image below)
This saved me at least $50-$80. There are a lot of other companies that offer discounts (for example, TurboTax does but only for E1-5.)
The nice thing about this offer from Military OneSource is there are no restrictions on your rank, your income, having additional forms you have to submit like investments, self employment, etc. Its all completely free!
Start your taxes today - http://www.militaryonesource.mil/financial-and-legal/taxes?content_id=295240
Another perk - Free specialized phone support
You can talk with a trained MilTax consultant free during tax season (January through April 18) seven days a week from 7 a.m. to 11 p.m. EST or EDT at 800-342-9647. After April 18, trained tax consultants are available Monday through Friday, 8 a.m. to 10 p.m. EDT. Call anytime to schedule an appointment.