If your illinois state return does not include the state Schedule NR, then as far as the program is concerned you were a full time resident of IL for the entire year. Therefore (as far as the program is concerned) there is no way possible you could be a resident of any other state for even one day of the tax year.
On the IL state return it asks if you were a resident for the entire year, and then it will ask the same question of your spouse. You must answer no for both, and then you must also enter the dates of your residency for the state. Until you do that, the CA state return will not allow you to file anything other than a non-resident state return.