I'm a Kansas resident but have 2 W2's for the same employer as I work at 2 of their locations. One in Missouri and the other is in Kansas.

My full wages are accounted for in my Kansas W2 boxes 1-6 but my Missouri W2 only has amounts in boxes 16, 17, 18, & 19.  Do I really have to mail in my federal return because the MO W2 has a blank box 1?