I've been .listening to this bruhaha (ha-ha) for several days now - and NO ONE gets the point.
The question isn't whether he paid taxes or not, the question is do his tax returns comply with the federal tax laws? I hope he paid no taxes. All he would be doing is taking advantage of the system congress and the presidents created ( note: mitt NEVER served in congress and hasn't been a president - he had no influence on making tax law).
How many people do you know who voluntarily don't declare all the deductions they are LEGALLY able to? Why shouldn't someone structure his business to minimize his tax burden?
This would be a perfect way to show how poorly written the tax laws are and ague for the fair tax or a simple flat tax.