TaxAlmanac

From the overview: TaxAlmanac is a free tax research resource created by Intuit, the makers of the professional  preparation products Lacerte and ProSeries. It is a revolutionary leap forward in how tax professionals research tax, create and share knowledge. The goal of the site is to transform tax research and to improve the effectiveness of tax everywhere. TaxAlmanac draws on the power of community. Simply put, none of us is as smart as all of us. Content on TaxAlmanac is written by tax professionals from across the country and takes advantage of the knowledge of academia as well as practitioners - in short, the real tax experts. The site includes key information that tax professionals find useful when conducting research - including the Internal Revenue Code, Treasury Regulations, Tax Court Cases, and a variety of Articles. (As of: 19 April 2013)