While we are unlikely to see tax reform this year, there continues to be a lot of work going on in the tax committees on it. And President Obama updated and released his framework for business tax reform this month (first report was released in Sept. 2012). I think the main impetus for the update was to address inversions to tie to the recent activities of IRS and Treasury.
At a speech to the U.S. Chamber of Commerce on April 15, Congressman Brady, chair of the House Ways and Means Committee stated:
There have been more hearings on tax reform including hearing proposals of members of Congress.
Senator Hatch, chair of the Senate Finance Committee, continues to work on his report on corporate integration (taxing corporate income once only).
As part of his April 15 speech, Congressman Brady also laid out his principles of tax reform. Here they are along with those that Senator Hatch released in December 2014.
Senator Hatch (wants broader base, lower rates and territorial system):