S. 845 · 112th Congress Tax Return Due Date Simplification and Modernization Act of 2011 StageIn committee SponsorMichael Enzi Introduced2011-04-14 Latest action2011-04-14 · Introduced in Senate Follow Summary Text Subjects Cosponsors (11) Votes (0) Actions Cosponsors (11) Mark Udall Former member Senate CO Democrat Saxby Chambliss Former member Senate GA Republican Tom Udall Former member Senate NM Democrat Mark Begich Former member Senate AK Democrat Johnny Isakson Former member Senate GA Republican Susan Collins Current member Senate ME Republican Sherrod Brown Former member Senate OH Democrat Kent Conrad Former member Senate ND Democrat Debbie Stabenow Former member Senate MI Democrat Jon Tester Former member Senate MT Democrat Olympia Snowe Former member Senate ME Republican