Col. Gentry Boswell, 28th Bomb Wing vice commander (center), congratulates volunteers for the base tax center during its grand opening at the Rushmore Center on Ellsworth Air Force Base, S.D., Feb. 1, 2013. Active-duty Airmen, retirees and family members of both can now file their 2012 taxes for free at the base tax center. For more information or to make an appointment, call the tax center at (605) 385-2329.