"Do I file a Part-year resident or Part-year non-resident return for Missouri?"
You're a part-year resident of MO. All your income as a MO resident is taxable by MO. And if you physically worked in KS during that time then you must also file a non-resident return for KS.'
After you moved to TX, any remote work you performed from a TX location is Texas-source income. Wages and salaries are sourced where the work is actually (physically) performed. Your income as a TX resident would be taxable by KS only if you physically performed work within KS. KS does not tax non-resident remote workers.
In the Personal Info section of TT, enter TX as your State of Residence. Indication that you also lived in MO and enter the date you began living in TX. Then indicate that you had Other State income from KS. Complete the non-resident KS return before you do the part-year MO return.
(Note: You should always complete your federal return before you do any state returns.)
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
