I am seeing payments being applied on the 1040 for excess social security and medicare.

I can't understand if these amounts are automatically flowing and how to even verify if they are correct.

Specifically, line 25 c and line 31 on the 1040

Can someone help me understand where these figures are flowing from in the software, if any manual entries need to be made, and how it is calculated (assuming simply based on W-2 entries)?