Here's a link to Square's amended S-1 registration statement:
http://www.sec.gov/Archives/edgar/data/1512673/000119312515369092/d937622ds1a.htm
Here are some links to stories about this:
Re/Code: http://recode.net/2015/11/06/square-takes-an-ipo-bullet-for-all-of-the-overpriced-unicorns/
WSJ: http://www.wsj.com/articles/square-outlines-ipo-terms-1446812826
NYT: http://www.nytimes.com/2015/11/07/business/dealbook/square-sets-conservative-ipo-price-range.html