Does my business need to register? (This link will take you to the City Clerk's page on the City of O'Fallon's website) Does my business need a permit? (This link will take you to the City of O'Fallon's web page on permits) City of O'Fallon Information for Businesses City of O'Fallon Census Information City of O'Fallon Guidelines on Signs City of O'Fallon Economic Incentive Policy Village of Shiloh Information on Shiloh Village of Shiloh City Ordinances Village of Shiloh Business Registration Village of Shiloh Residential Registration St. Clair County St. Louis Regional Chamber and Growth Association St. Clair County Employer Data and Demographics State of Illinois resources for new and established businesses State of Illinois Department of Commerce and Economic Development State of Illinois Office of the Treasurer State of Illinois Chamber of Commerce State of Illinois Buy Illinois Network		State of Illinois Attorney General's Office Southern Illinois University Edwardsville Small Business Development Center Southern Illinois University Edwardsville Entrepreneurship Center Eastern Missouri and Southern Illinois Better Business Administration United States Chamber of Commerce United States Federal Business Opportunities United States Small Business Administration Office of Advocacy Free, confidential business advice for entrepreneurs from SCORE, a volunteer organization of retired and working executives Internal Revenue Service Tax Centers - Provides a full list and links to each of the available IRS Tax Centers Small Business and Self-Employed Tax Center Payroll Professionals Tax Center - Information for payroll professionals and their clients St. Clair County Economic Development Department Leadership Council Southwestern Illinois - Scott AFB Impact Study (Study can be found on right side of webpage.)