States tax income based on residency and nexus (effectively connected income). ie. if you live there you pay tax, if you earned it in the state you pay tax.
You were a resident of MD until 6/30, you are correct you file a tax part year tax return for that income. technically you were a resident of MO for a little over 2 months. you should file a part year resident return for MO. You were a resident because you were there and did not have another tax home. Filing a part year vs non-resident MO return should make no difference.
Great thank you
As of 9/25, you have no tax home in the US, and no effectively connected income to any state, thus you have no need to file any state return. Your only requirement as a US citizen is to file a US tax return.
But I do still have to file MO and MD tax returns this year since I lived there I assume. For the next year, I need only to file federal return, correct?
Correct, two state returns for 2011, no state return for after 9/25 and 2013.
No state return for 2012.
Perfect, thanks again for your help!