Earning money in MO means that MO will tax all income earned there, residency is not a factor. KS will give you a credit for the time you were a resident of KS.
Kansas residency means that all income goes onto your KS return and you then receive a credit for the MO income. Mo says
...a Kansas resident you may claim this credit if: 1) your KAGI (line 3) includes income earned in the other state(s); and 2) you were required to pay income tax to the other state(s) on that income. Important—Your credit is NOT the amount of tax withheld in the other state(s); it is determined from the “Worksheet for Residents”
Please see full details for filing KS by clicking on the blue words.
Please see MO FAQ by clicking on the blue words. It has both non-resident and part year resident information.
@faajaa40 and great response by @TomD8
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