I just looked at my return and I have always reported the W2 on Line 1 for federal wages, Box 12 with code Y and Line 16 for state wages.  I have federal and state taxes withheld so I also use boxes 2 and 17.

True Deferred Comp is a non-qualified plan.  I believe Line 11 on the W2 form is only for Qualified plans. Sorry I told you the wrong line in the first response.

Regards, 

Laura