If you have received a notice from the IRS, TurboTax offers a downloadable Audit Support Center- it provides a step-by-step assistance for dealing with all kinds of IRS letters. Be sure to respond to the letter by the deadline provided in the letter.

If you inquiring about Audit representation, TurboTax offers Audit Defense - it provides full representation in case of an IRS audit.  Audit Defense is available for purchase from within any TurboTax product for an additional fee.