The Massachusetts Deferred Compensation SMART Plan is a voluntary retirement savings program. You won't pay any current federal or state income tax on your Plan savings.The amount you save in your deferred compensation. Keep your funds in the Plan for access to all the benefits associated with the Plan. ▫ Your SMART Plan accepts rollovers from your other retirement accounts―. An overview of the Massachusetts Deferred Compensation SMART Plan. Participating in the. SMART Plan allows you to defer a portion of your salary now so you will have access to it in the future. Enter the new number of your starting deferral, in either a percentage or dollar amount.