You don’t need to involve payroll. It’s very nice that you want to pay payroll tax but it’s not required, why be out an additional $230 for no reason.
If your HSA won’t calculate the right amount, they may not report it correctly on your 5498 or 1098 either which concerns me. Can you withdraw the $3450 from your spouses HSA? Maybe they know how to do the calculation correctly. You don’t need to involve the spouse’s employer, just report it in TurboTax.
