Can u file married head of household

You might be able to claim Head of Household if you are married, but considered unmarried.

If you are legally married as of December 31 and a child lives with you, you can qualify for Head of Household under a slightly different set of rules. Read more  

After you answer all the questions about yourself and your dependents at the beginning of your return, we'll let you know if your situation qualifies for Head of Household.  

You can also revisit these questions by selecting My Info (online) or Personal Info (software), then selecting Edit next to your name or your dependent's.