New York State's estate tax is calculated using the tax table provided on Form ET706. There are multiple versions of Form ET-706.All required New Jersey Estate Tax returns must be filed within nine (9) months of the date of a resident decedent's death. Not only do you have to file the decedent's final income taxes, but you will also need to file an income tax return for the estate itself. Find common questions and answers about estate taxes, including requirements for filing, selling inherited property and taxable gifts. The income tax return form for estates is IRS Form 1041. It's also called a "fiduciary" return, because you file it in your capacity as executor of the estate. An estate tax return is required if the gross value of the estate is over a certain threshold. Balance of Estate – Subtract line 8 from line 7 (If line 8 is zero, enter amt from line 7). 9. 10. When filing as an executor of estate, on the Form 1040, include only income and expense items up to the date of death.