The Audit Risk Meter (pictured here) gives you a visual indication of your possible audit risk.
It's exclusively available in TurboTax Deluxe, Premier, and Home Business Desktop 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. Additionally, the IRS's focus on audit risk factors changes periodically and is not made public. As a result, a low reading is no guarantee you won't be audited, nor does a high reading necessarily mean that you will be audited.