By the way, here is the Wikipedia article for the man in jail for failure to pay taxes: http://en.wikipedia.org/wiki/Walter_Anderson_%28tax_evader%2...
[Edited: had said "friend" which was incorrect]
tl;dr
He admitted to reporting only $67,939 in a year he made $126 million. He further admitted to hiding a total of $365 million.
[Edited: hadn't included the $126 million detail for the year he under-reported]