I contributed the maximum to my Roth 401k ($24,500) and Roth 457 ($24,500) plans. The first time through I passed the error check. Then I had to file an amended form. When I conducted error check the second time, Turbotax flagged box 12b and 12c on the w-2 summary. The error message says: Elective deferrals - TP $49000 is more than the allowed $24500 for a 401k plan. I cannot clear the error.