http://politicalticker.blogs.cnn.com/2012/07/17/perry-renews-his-call-for-romney-tax-docs/

Perry first called on Romney to release his tax returns when running for the GOP presidential nomination, and in late January, Romney released his records for 2010 and an estimate of his liability for tax year 2011. He has since said that he does not intend to release additional years, as Democrats - and an increasing number in his own party - have called for.