The Internal Revenue Service is letting the families of servicemen and servicewomen deployed to combat zones know that Uncle Sam still wants income tax returns filed, but there’s no need to meet the April 15th filing deadline. Bill Barksdale with the IRS in St. Louis says military personnel in combat zones have 180 days from the time they exit the zones to file those returns … and this extends to the families left behind in the U.S. In addition to the filing extension, the IRS reminds military families that wages earned by service personnel in combat zones are free of federal taxation.