Since I posted, apparently now Cruz and Rubio have released INCOMPLETE versions of their tax returns. In other words, they have released their 2-page 1040 forms, without all of the lettered schedules, 4-digit forms, supporting statements, and whatever else it takes to keep the IRS off your back.
Compare and contrast with Romney, whose complete 2010 and 2011 returns are there at that site, which come close to 600 pages in total.
“Compare and contrast with Romney, whose complete 2010 and 2011 returns are there at that site, which come close to 600 pages in total.”
It seems more relevant to compare with Trump in 2016.