I do not understand how to calculate how much of my total wages earned while living or working in IL. We moved to IL 10/3/25, both still work in Missouri.

jillr331 · ‎January 27, 2026

we moved from MO to IL on 10/3/25, and TT is asking "tell us about your Illinois income. How much of the $xxx did you earn while living or working in IL

AnnetteB6 · ‎January 27, 2026

Even though you still worked in MO after your move to IL in early October, you will need to prorate your income as it is reported on your IL state return.

You could always go through your pay stubs and add up the amounts that you earned after your move in October. But, if your income was reasonably consistent on a monthly basis throughout the year, then you can just prorate the total income by month. Take the total amount ($xxx) and divide it by 12. Then multiply that amount by 3 for the 3 months that you lived in IL during 2025.

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AnnetteB6 · ‎January 27, 2026

Even though you still worked in MO after your move to IL in early October, you will need to prorate your income as it is reported on your IL state return.

You could always go through your pay stubs and add up the amounts that you earned after your move in October. But, if your income was reasonably consistent on a monthly basis throughout the year, then you can just prorate the total income by month. Take the total amount ($xxx) and divide it by 12. Then multiply that amount by 3 for the 3 months that you lived in IL during 2025.

**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"

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I do not understand how to calculate how much of my total wages earned while living or working in IL. We moved to IL 10/3/25, both still work in Missouri.