The State of Illinois Deferred Compensation Plan is a supplemental retirement program for State employees. 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. This voluntary plan, called the SURS Deferred Compensation Plan (DCP), provides members an avenue to save more and generate additional income in retirement. It is easy to enroll. Follow these simple steps to get started: 1. Please schedule a Local Office: In-Person Appointment or call us at 1-855-457-2489. Contributions to the Plan can be made on a pre-tax or after-tax (Roth) basis through salary deferrals. Enter above the county name where the case was filed. The home of your State of Illinois Deferred Compensation retirement account.