if your marriage is solemnized ( under the state law and/or recognized by the state) by the 31st of December, you are married for the whole year. As such you have only three filing status available to you --- Married Filing joint, Married Filing Separate and Head-of-Household ( if you are living separate ( from your spouse ) at least for the last six months of the year AND are maintaining a home for a dependent child or for a relative. You spouse is never your dependent
