Download a free Illinois LLC Operating Agreement template (Word, Google Doc, PDF). List LLC Members, profit splits, tax info and more.A Illinois Operating Agreement creates the policies and procedures for your LLC. Our free, attorney-drafted templates can get you started. In the operating agreement, you should also describe the management and ownership structure of your LLC. Each LLC must have an address for a principal place of business, which may or may not be in Illinois. An LLC management agreement is needed when an LLC opts to appoint a manager to run the daytoday business operations. 10. The operating agreement provides for the establishment of one or more series. The first thing you will need to do to form an LLC is to complete your Articles of Organization. Then file them with the Secretary of State.