What if I am a resident of another state with income from Kansas?
You are required to file a Kansas income tax return. File as a nonresident and complete Kansas Schedule S, Part B.
Answer is from:
https://www.ksrevenue.org/faqs-taxii.html
Your son's grant money, if received while living in Idaho or from an Idaho source, is taxable by Idaho. See "Student" in this Idaho tax reference: https://tax.idaho.gov/i-2014.cfm?seg=specificc
All out-of-state income received by you or your son is also taxable by your home state of MO. MO allows a credit on its tax return for taxes paid to another state, so neither of you will be double-taxed. But you each must include the out-of-state income on your MO tax return. In TurboTax, complete the out-of-state tax returns before the home state tax returns, so that the credit flows properly.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
