Just a quick link to document the amount of taxes companies actually pay. The corporate tax rate in the US is pretty high. 35%. Conservatives point to this like it explains our economic problems, and if only we'd reduce it we'd be in better shape. But this is a nominal rate, not an actual rate. You may have heard recently about how Apple, one of the most profitable companies in the world, manages to pay such a low amount in taxes. Jon Stewart skewers them here, making a pretty good point as they complain about our complicated and difficult tax code. It's not poor people that have created this complexity. This is the result of corporate lobbying efforts.
Anyway, it looks like the total tax rate for companies in the Fortune 500 is 29.1% over the last 6 years. This is all taxes, including state, local, and everything spent to governments in other countries. So the federal US rate of 35% is very misleading.