http://thinkprogress.org/politics/2016/05/11/3777219/trump-called-mitt-romney-release-tax-returns-wont-release/
"It’s also a sharp break from Trump’s own advice to Mitt Romney. In January 2012, Trump told Greta Van Sustren that Romney “was hurt really very badly” by his initial refusal to release his tax returns. He advised Romney to “release them now"."