How to file a state tax: the estate of a deceased person is considered a separate legal entity from the person for tax purposes. If you are the executor or administrator of an estate, you probably will have to file the final personal income tax return for the deceased person. You also may be responsible for filing an estate income tax return or an estate and gift tax return. These two taxes are completely different. While you typically can file an estate income tax return on your own, you should avoid attempting an estate and gift tax return unless you are an attorney, accountant, or tax professional with experience in the area. When filing in a state income tax return, determine whether you need to file an estate income tax return. You typically only need to file an estate income tax return if the estate has received income of $600 or more. A state income is different from any income earned by the deceased person in the year he or she died. For that income, you can file a regular income tax return just as living people do. A state income would include rent paid on real estate the deceased person owned or interest on an estate bank account. You also must file an estate income tax return if one of the deceased person's beneficiaries is a non-resident alien. Trusts with income over $600 also must pay a state income tax. Calculate the estate's tax year. Generally, you have one year from the date the deceased person died to file an estate income tax return. Although the tax period begins on the date of death and ends 12 months later, it must end on the last day of the final month. For example, if the person died on January 15,...