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.A deferred compensation agreement is an agreement between a company and an employee that withholds paying some of the employee's salary. 1. Now that you're ready to enroll, complete the. CMS enrollment form. A deferred compensation plan is any plan that withholds a portion of an employee's pay until the end of the deferral period. As discussed in Note 1, the financial statements present only the State Employees' Deferred. When a person receives wages (i.e.