N.Y. Comp. Codes R. & Regs. tit. 20, § 152.15
Where a taxpayer has filed a New York State income tax return prior to the expiration of the taxable period (see section 152.5 of this Part), and later an amended New York State income tax return is filed on or before the final due date, the income tax due upon such amended return must be paid in full, without assessment, notice or demand, on or before the due date for filing a final New York State income tax return for the taxable period.