Schedule 2 1040 amending had wrong code on w2 box 12?

[tamidennison]

I'm trying to amend, and I've updated on the form but its not adjusting taxes

[VolvoGirl]

What code is wrong?  What did you enter and what should it be?  You may not need to amend.  

[tamidennison]

I had an additional medicare tax box checked and it should have checked 401k so I paid taxes I shouldn’t have trying to figure how to amend to get refund but when I amend it in turbo tax it doesn’t update the schedule 2. Thanks