Forms 1041 and 1041-A: When to file

Form 1041: Estates or trusts must file Form 1041 by the 15th day of the fourth month after the close of the trust's or estate’s tax year.  For example, for a trust or estate with a tax year ending December 31, the due date is April 15 of the following year.   A trust or estate with a tax year that ends June 30 must file by Oct. 15 of the same year.

Form 1041-A: Form 1041-A is a calendar year return which is due by April 15.

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