W-2 shows codes M & N in box 12. No wages, SS wages or medicare wages. How do I clear diagnostic?
The diagnostic is just telling you why there are extra taxes added to the liability. There's nothing you need to do other than review the return for accuracy.
Acknowledge Informational Diagnostics by checking the box. That crosses them off and leaves a trail that you saw it and knew what it meant. Check or no check it has no impact on filing.