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 must also attach federal form 706, United States Estate Tax Return. 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. The New York estate tax is calculated quite differently from the Federal estate tax. New York State estate tax returns (Form ET 706) must also be filed within nine months of the decedent's death. A New York State estate tax return must be filed within nine (9) months after the decedent's death. Find property information, pay property taxes online, explore property records (ACRIS), apply for tax exemptions and abatements. Most personal property (for example, alcohol, furniture, electronics, etc).