What do you do with 12z on a W2?

[toni-z-mccarty]

How do I categorize a 12Z entry?

[DoninGA]

Box 12 Code Z —Income under a nonqualified deferred compensation plan that fails to satisfy section 409A. This amount is also included in box 1. It is subject to an additional 20% tax plus interest.

This is unusual and the calculations for the additional tax and interest on this are not supported by TurboTax.

[ferhamirdawi]

My W2 noted a 12z for a deferred income plan I participate in; however I am getting this error below- how can I file - the info is accurate?  "Form W-2 (Lending Tree, LLC): Box 12 code of Z is income under a nonqualified deferred compensation plan that fails to satisfy section 409A. This is unusual and the calculations for the additional tax and interest on this are not supported."