@coolbean
"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). "
That may change things considerably. You need to become familiar with the idea of domicile. Domicile is your one real permanent home. You only have one domicile at a time. You remain domiciled in one place until you take active steps to establish a new domicile and abandon the prior domicile. Even though you owned a house in Texas, your domicile could be in Illinois, depending on the totality of the circumstances.
Even if your domicile in is Texas, many states have a statutory resident rule. That means that even if you are domiciled in one state, you are considered a resident of another state for tax purposes if you live in that state long enough. I am not an expert on Illinois but I briefly reviewed the Illinois law, and it says that you are a resident if you live in the state the entire year (even if you are domiciled elsewhere), and if you were a resident one year, you are a resident the next year if you lived in Illinois more days than you lived in any other state.
https://ilga.gov/commission/jcar/admincode/086/086001000J30200R.html
You certainly should have filed your California return as a part-year resident and not a non-resident, since you changed your domicile. But as @TomD8 noted, California uses form 540NR for part-year residents, so just knowing which form you used doesn't tell us what you declared as your residency status.
You need to determine how you should have filed in Illinois based on their laws and regulations. Even if you had a home in Texas, you might have been an Illinois resident for tax purposes. Then, after determining if you were a resident, non-resident or part year resident, you will need to figure out what proof the state will accept.
You may benefit from professional assistance.
