Should my w2 12b code w amount: $3499 be different than my HSA amount?When I get to the HSA portion, Turbo Tax has $3700 entered automatically.

My w-2, line 12b, code W has 3499.94 next to it. When I get to the HSA portion of the taxes, Turbo Tax has $3700 automatically entered. Where are they getting this amount? SHouldn't it be $3499.94? I can't change the $3700. Please help explain.