Your marital status is what you were on the last day of the tax year. If married in 2015 then you must file married - either separately or jointly. Jointly is usually always best.
But you said above, that you filed jointly last year - do you mean with your ex-spouse and not your present spouse?
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
