I think I missed something along the way as I was spending way too many years in school studying science and engineering, but I was always under the impression that if I didn't pay my taxes perfectly, I would get audited and the IRS would hound me to my death (see IRS demons in Spellsinger 6).
so no, I've never cheated on my taxes. However, since government officials seem to be able to get away with it without even a slap on the wrist, I might as well do it too.
note to big brother: I was just kidding. I don't do my own taxes, so please don't hound me like you did Couvier Coulb.