State tax filing

KathrynG3...you still have not answered the question!!!  The Turbo Tax program IS requiring that we Illinois residents must choose a Locality Group (1,2 or 3)  to fix the error flag.  BUT there is no explanation of how we are supposed to know or find out what locality group we live in!!  We have already entered our location as Illinois for the whole year, yet the program is still error flagging and requiring we check a box for which Locality Group we belong to.  We have no clue where to find out what "Locality Group" we need to choose to fix the error flag.