I was a full year resident of KS, but my husband was a part year resident in KS and MO. How do we mark that is turbotax? It marks us both as part year residents in MO.

[gb115407]

Make sure you prepare the non-fulltime-resident state return first, THEN the resident state return

[TomD8]

Be sure you answered the questions in My Info correctly for each of you.  TT uses those answers to determine your correct residency.
Are you sure your husband was a part-year resident?  For example: if his domicile (his main, primary home) was in one of those states all year, and he was in other state only temporarily for school or work, he would be considered a full-time resident of his domiciliary state and a non-resident of the other state.
A part-time resident is someone who literally moved his domicile from one state to another during the tax year.