manually select the state my deceased mother lived in

I'm trying to file my deceased mother's taxes.  The address on the form is my own (Virginia) which is where all correspondence should go since I administer her estate.  But she lived in Illinois.  Illinois is where the state taxes must be filed.  I am unable to find the place to manually select the state of Illinois for her filing.  The user interface always routes me to Virginia with no option to manually select another state.  How can I manually navigate to the filing for Illinois taxes?