If you continued to work in MO after your move to KS, be aware that any income you earn by working in MO continues to be taxable by MO, even if you are no longer a resident of MO. So if you are continuing to work in MO, your employer should still withhold MO taxes.
Your income in that scenario will also be taxable by KS after you become a KS resident, but you'll be able to claim a credit on your KS return for the taxes paid to MO on the income taxed by both states. Thus you won't be double-taxed.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
