All of your wages from all sources would be added to your home state and your federal return.
Iowa does not offer a state extension.
"If at least 90% of your total tax liability is paid by May 1, 2023, you will automatically have an additional six months to file your return. You have until October 31, 2023, to file your return timely. You will not be charged a late file penalty. However, you may owe an IA 2210 penalty for failure to make estimated payments. You will owe interest on any tax still due after May 1, 2023."
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