Thanks for the reply! I actually own a permanent home in TX and that's why I filed nonresident for both IL and CA. I lived in IL until March 2022 and moved to CA in Aug 2022 (the rest of the year was in TX).
I received a "Return Correction Notice for Illinois Individual Income Tax" which asks for a letter from my employer that can confirm the income earned in IL. IL doesn't agree with my way of allocating the income because my employer has reported all income on my W2 as earned in IL.
I could ask IL if they can accept other forms of proof that I permanently left IL, but I think it's gonna be a long shot. In that case, I would still need a tax credit from CA.
