Download any State of Illinois Deferred Compensation Plan form now using Acrobat Reader. These forms allow data to be typed into the form and saved.The State of Illinois Deferred Compensation Plan is a supplemental retirement program for State employees. The City of Chicago has approved and adopted an amended and restated City of Chicago Deferred Compensation. A deferred compensation agreement is an agreement between a company and an employee that withholds paying some of the employee's salary. As discussed in Note 1, the financial statements present only the State Employees' Deferred. 1. Now that you're ready to enroll, complete the. CMS enrollment form.