Enter the amount that you received as a pension or annuity from a nonqualified deferred compensation plan or a nongovernmental 457 plan. This may be shown in box 11 of Form W-2. If you received such an amount but box 11 is blank, contact your employer or the payer for the amount received. (Emphasis supplied.)
In general, deferred compensation plans allow the participant to defer income today and withdraw it at some point in the future (usually upon retirement) when taxable income is likely to be lower. Like 401(k) plans, participants must elect how to invest their contributions.