I’ve been living apart from my spouse for the entire last year of 2017. The date of separation was in 2016, but the divorce is not finalized yet. I filed my taxes for 2016 as “Married Filing Separately” as I could't get in touch with her and she didn’t file her taxes at all as far as I know. We’re estranged and I still can't get in touch with her. We don’t have any children. Is there any way to be “considered unmarried” and have a different filing status for the year of 2017?