Mass. Gen. Laws ch. 29, § 2ZZZZZ

There shall be established and set up on the books of the commonwealth a separate fund known as the Commonwealth Taxpayer Relief Fund. The fund shall be credited with appropriations or other money authorized or transferred by the general court and specifically designated to be credited to the fund. Amounts credited to the fund shall be expended to support the implementation of new tax relief measures taking effect in tax year 2022 and thereafter. Money remaining in the fund at the end of a fiscal year shall not revert to the General Fund. The fund shall not be subject to section 5C of chapter 29.