Citizens for Tax Justice, January 2013 

There are at least three major categories of tax reforms Congress could pursue to raise revenue. They include ending tax breaks and loopholes that allow wealthy individuals to shelter their investment income from taxation, ending breaks and loopholes that allow large, profitable corporations to shift their profits offshore to avoid U.S. taxes, and limiting the ability of wealthy individuals to use itemized deductions and exclusions to lower their taxes.

Download Working Paper on Tax Reform Options