It's exclusively available in TurboTax Deluxe, Premier, and Home & Business CD/Download versions and can be accessed on the Review tab (under Audit Protection).
Note: The IRS randomly reviews a small percentage of returns regardless of audit risk. In addition, the IRS's focus on audit risk factors changes periodically and is not made public. A "low" reading is no guarantee that you won't get audited, or vice versa with a "high" reading.
