Deductions & credits

Yes.  It should already be deducted.  However, in my case it was not.  I know both my base pay and any bonuses/awards added and totals the correct Gross Income wages typically shown on W2 box 5.  This is without knowing what level I would contribute to the HSA for the year so the salary is not based on a guess at what I would contribute to the HSA.  The 401K was deducted,  box 12 D, but not the HSA  box12 W from the Gross Income.   How would I deduct the HSA I contributed?