If you work in IA, live in IL and had IA withholdings taken out in error, then you really needed to file your IA return by mail (reporting $0 income) and could have efiled your IL return. Your IA efiled return will not include any information about your IL return being filed.
In order to get the
full refund of your nonresident state income tax withholdings, you will need to
file a nonresident return but report zero "0" income from the
nonresident state. You need to file your nonresident state return this way
because your resident state does not allow a credit for tax paid to a
reciprocal state on wages, salaries and commissions. If tax was withheld by a
reciprocal state, you must file directly with the state for a refund of those
taxes. You must mail in this nonresident state income tax return and include
your state W-2 information. You will want to include an explanatory statement
with your return stating your situation (that your nonresident state employer
withheld nonresident state taxes from your wages in error due to a reciprocal
agreement with your resident state).
Also once you efile a return, if you need to make changes or amend, you would have to file by mail.
How
to Amend a Return You Already Filed
