on the w2 box 12 has c,d,w and dd. which box do i enter for 1099 sa?

[Bsch4477]

The 1099-SA is for reporting distributions from your HSA. Employer contributions will be on box 12 of your W-2 with the code W. 

[MarilynG1]

If you entered all the Box 12 info from your W-2, it shows you have an HSA.  Unless you actually received a 1099-SA form (you took a distribution from your HSA), skip that and Continue in the section.  You'll enter info about your HDHP insurance, and any contributions you made personally (not through your employer).

@darchambeau