(Bloomberg) -- The very rich are different from you and me. They even have their own IRS audit squad.

Saturday marks the start of the fourth quarter, a time of financial reckoning, of crashing toward quotas and scrambling to reach year-end targets. Corporations and individuals alike rush to cut the income tax they'll need to pay next year. Some go too far (or just miss things, or misunderstand what and how they need to report). The IRS collected $6.3 billion last year assessing taxpayers for underreported income. Among them are the big fish, honored with the IRS equivalent of a SWAT team.

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