That claim is such utter bullshit that it isn't even worth for a citation. Use your head, man. I mean, how utterly ignorant can you be?
Yes, it's worth a citation. In fact, I have a couple for you. Here's a Fortune Magazine article that shows my claim is true. There's even a nifty graph for you to look at and not understand.
the fact is that the US has one of the highest effective corporate tax rates in the world (go look it up).
Yeah, I looked it up:
And here's the full (peer-reviewed) article, for your perusal. Let's hope you are more capable of perusal than you are of simple Google searches.