As of the date of this petition (2/24/16), Democratic Primary Candidate Bernie Sanders has not released his personal joint tax returns reflecting the combined income and assets of he and his wife, Jane Sanders.
Since his opponent, Hillary Clinton, has made public on her website, HillaryClinton.com, 8 years (2007 through 2014) of joint tax returns filed with her husband, President Bill Clinton, it's only fair and equitable for candidate Bernie Sanders to do the same.