The Defense Department is offering H&R Block At Home online tax filing free to active duty, National Guard and Reserve service members and their families. Eligible participants can access the service through Military OneSource. Users must go to the link on the Military OneSource Web site to access the customized product and create an account. Please do not create an account on the public H&R Block site. Tax consultation by phone also is available by calling Military OneSource's tax hot line at 800-730-3802. Hot line consultants are available seven days a week from 7 a.m. to 11 p.m. Eastern. More information is available online.