The IRS has issued guidance, in question-and-answer format, to clarify certain filing questions and ambiguities faced by same-sex couples in state-recognized marriages, civil unions, and domestic partnerships. Despite the facts that the Obama Administration has decided not to defend the Defense of Marriage Act (DOMA), and that a number of courts have struck down the key provision in DOMA that denies recognition of same-sex marriages for purposes of administering federal law, the IRS continues to maintain that legally married same-sex couples don't qualify for tax benefits otherwise available to heterosexual married taxpayers.