Medicaid Waiver and W2 Entry

My W2 has amount in Box 1 and no code or amount in box 12 (because this Medicaid waiver is new to our agency this year-next year's w-2 will be set up correct).  Agency will not issue a 2025 corrected W2.  How do I properly exempt the box 1 amount as nontaxable Medicaid waiver (IRS Rule 2014-7).  I've tried various ways and have seen it double my taxable income; also seen it not transfer to my Mass. state tax return.  Can somebody give simple instructions.  TurboTax should have been on this simple fix.