Income earned in IA was taxed by IA and your income earned in NE was taxed by NE........I don't see a problem.
If you were taxed by your home state of Iowa for the income earned and taxed in Nebraska and didn't get a credit for it then you either have a moron for a tax preparer or you did it yourself.
I am NOT going to sit here or anywhere else going “Back and Forth” w/ you concerning taxes. What I paid(or did NOT pay) in income tax to either the Feds, 2 States, and localities is NONE OF YOUR DAMNED Business. So in that vein, GO TO HELL, Troll!