Inclusion of HSA contributions in NJ state wages

I am a resident in NJ, and have three sources of HSA contributions: 1) employer contribution, 2) employee contribution through payroll, 3) employee contribution outside payroll (to reach the contribution limit).

In my W2, federal wages (box 1) is calculated as

gross pay

+ GTL (C-Box 12)

— 401(k) (D-Box 12)

— Other Cafe 125 (i.e., medical premiums)

— Cafe 125 HSA (W-Box 12) (i.e., HSA employee contribution from payroll)

My W2 does not report NJ wages, so I need to calculate it on my own for line 15 in the NJ-1040. How should it be calculated, particularly given the different sources of HSA contributions?

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