N.Y. GCM Law § 6

§ 6. Payment and lien of tax. 1. To the extent the tax imposed by\nsection three of this part shall not have been previously paid pursuant\nto section eight of this part,\n (a) such tax, or the balance thereof, shall be payable to the\ncommissioner of finance in full at the time the report is required to be\nfiled, and\n (b) such tax, or the balance thereof, imposed on any taxpayer which\nceases to do business in the city or to be subject to the tax imposed by\nthis part shall be payable to the commissioner of finance at the time\nthe report is required to be filed; all other taxes of any such\ntaxpayer, which pursuant to the foregoing provisions of this section\nwould otherwise be payable subsequent to the time such report is\nrequired to be filed, shall nevertheless be payable at such time. If the\ntaxpayer, within the time prescribed by section five of this part, shall\nhave applied for an automatic extension of time to file its annual\nreport and shall have paid to the commissioner of finance on or before\nthe date such application is filed an amount properly estimated as\nprovided by said section, the only amount payable in addition to the tax\nshall be interest at the rate set by the commissioner of finance\npursuant to section eighty-seven of part six, or, if no rate is set, at\nthe rate of six per centum per annum upon the amount by which the tax,\nor the portion thereof payable on or before the date the report was\nrequired to be filed, exceeds the amount so paid. For purposes of the\npreceding sentence:\n (1) an amount so paid shall be deemed properly estimated if it is\neither (A) not less than ninety per centum of the tax as finally\ndetermined (computed without regard to any credit allowable under\nsection four-a of this part), or (B) not less than the tax shown\n(computed without regard to any credit allowable under section four-a of\nthis part) on the taxpayer's report for the preceding taxable year, if\nsuch preceding year was a taxable year of twelve months; and\n (2) the time when a report is required to be filed shall be determined\nwithout regard to any extension of time for filing such report.\n 2. The director of finance may grant a reasonable extension of time\nfor payment of any tax imposed by this part under such conditions as it\ndeems just and proper.\n 3. Subdivision one of this section shall apply to a taxpayer which has\na right to a credit pursuant to section four-a of this part, except that\nthe tax, or balance thereof, payable to the director of finance in full\npursuant to subdivision one of this section, at the time the report is\nrequired to be filed, shall be calculated and paid at such time as if\nthe credit provided for in section four-a of this part were not allowed.\n