Moved to South Carolina in last week of August, my W2 does not break down income by state. Am I able to file only under Illinois since residency is less than 6 months?

[TomD8 · Accepted solution]

You must file a part-year resident return for each of the two states; you can't just file for Illinois.  This TurboTax FAQ explains how to allocate your income between the two states:  https://ttlc.intuit.com/questions/2895983-how-do-i-allocate-split-income-for-a-part-year-state-retur...