This issue is now understood and was an entry error on my part. This Subject post could be deleted as not relevant or helpful to a real issue. The error resulted from a 2nd W-2 (my wife's) being imported but incorrectly being assigned to me (i.e. This W-2 belongs to ....). This caused TubroTax to add her retirement deferral to mine and that sum exceeded the limit . Correcting the W-2 assignment corrected the overage warning message. User error.
