New York State's estate tax is calculated using the tax table provided on Form ET706. There are multiple versions of Form ET-706.You will have to file all necessary tax forms and open a checking account in the name of the estate to pay any estate expenses. You must also attach federal form 706, United States Estate Tax Return. The taxable rate is determined based on the New York state estate tax exemption. This file contains important instructions for filling out Form ET-85 for New York State Estate Tax Certification.