QB payroll started withholding taxes on a phantom $13K/month s-corp health insurance. It will appear on my W2s. They are unable to fix it. What do I do?

Starting about January 25th you should be able to file your personal return and if you have overpayment at that time ypu can get a hefty refund. Asking the IRS to refund overpayment? Might as well try to herd cats or push a rope.