Thanks for the response.
He is the resident of IA and his employer is in IA too and he said that IA is listed on his W-2 (box 15, I think) and he lived in IL from Nov. 1 until Dec. 24th and went back to IA until after January 4 that he went back to IL again and is there for now (again temporarily for another month or two). So, does he have to file for both IA and IL taxes?
