Your company is doing it correctly.
Your resident state of Kansas can tax all your income, regardless of where you earn it.
Missouri can tax the income you earn from work you actually (physically) perform in Missouri.
You can claim a credit on your Kansas return for the taxes you pay to Missouri, so the end result is that you won't be double-taxed.
In TurboTax, be sure to complete your non-resident MO tax return before you do your home state KS return, so that the program can calculate and apply the credit correctly.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
