Also keep in mind, that while it may appear you are taxed twice on your CA income, you will receive a credit for taxes paid to other states on your IL return.
This minimizes the "double tax" impact.
Prepare your CA return first as you will need this information when preparing your IL return.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
