a wife is never a dependent. And as a nonresident alien you cannot claim a dependent anyway, nor can you file jointly. Have a look at publication 519 <a rel="nofollow" target="_blank" href="
https://www.irs.gov/publications/p519/">https://www.irs.gov/publications/p519/</a> You will have to amend your 2015 return accordingly and file your 2016 correclty
