If you are already enrolled in DCP, do not use this form. The Deferred Compensation Program is a supplemental retirement savings program you control.Resources for your reference are available on this website:. Select "Your Plan Page" from the available options (either from the drop-down list or the box on the Employees page). 3. Employees have the option to participate in a choice of IRS 457 deferred compensation plans - pretax and Roth post-tax options. Every step of the way. The DCP is a 457(b) deferred compensation plan. Use this form only to enroll in the Washington. State Deferred Compensation Program, a 457(b) plan with pretax and Roth contribution options. This is a participation agreement to enroll in the Washington State Deferred Compensation.