HOW DO I GO ABOUT OPENING A SMALL BUSINESS IN ILLINOIS?

I am the singular mom of two, as well as I am meddlesome in opening the tiny commercial operation for infants as well as children’s items. What is the routine to do this, as well as about how most does it price incompatible my inventory? I already know how most which will be. Do I need the commercial operation license? And how do I get the taxation ID obligation for the business? I unequivocally wish to do this as well as any assistance would be severely appreciated!