N.Y. Tax Law § 187-f

§ 187-f. Order of credits. Credits allowable under this article which\ncannot be carried over and which are not refundable shall be deducted\nfirst. Credits allowable under this article which can be carried over,\nand carryovers of such credits, shall be deducted next, and among such\ncredits, those whose carryover is of limited duration shall be deducted\nbefore those whose carryover is of unlimited duration. Credits allowable\nunder this article which are refundable shall be deducted last.\n