Retirement tax questions

I'm looking at my 2 W2s and what I entered into Turbo tax and it lines up. I'm not sure what would flag the Line 11 Schedule 3 to indicate a 1

 

Box 12 - Letter code— D  Elective deferrals to 401(k)
Box 12 - Amount
***HIDDEN VALUE***
 
 
Box 12 - Letter Code - No selection
Box 12 - Amount - Left Blank