IRS says "If you and your spouse do not choose to treat the nonresident spouse as a U.S. resident, you may be able to use head of household filing status. To use this status, you must pay more than half the cost of maintaining a household for certain dependents or relatives other than your nonresident spouse. " I don't pay more than 1/2 the cost of maintaining a household for certain dependents or relatives because I don't have dependents nor relatives who are living with me.
