When are individuals of the same sex lawfully married for federal tax purposes? Per the IRS, "for federal tax purposes, the IRS looks to state or foreign law to determine whether individuals are married. The IRS has a general rule recognizing a marriage of same-sex spouses that was validly entered into in a domestic or foreign jurisdiction whose laws authorize the marriage of two individuals of the same sex even if the married couple resides in a domestic or foreign jurisdiction that does not recognize the validity of same-sex marriages." |