After you file

audit protection does not stop the IRS from changing your return. its records or computations indicate that the return has incorrect information 

if the IRS changed the RCTC it's because their records indicate you got more than what you reported. the IRS could be wrong. in that case, use the Audit protection

The Audit Defense service is provided by TaxResources, Inc., also called TaxAudit.com, in partnership with TurboTax. If you paid for Audit Defense and you received an IRS notice, call TaxResources, Inc. at 877-829-9695, or report your IRS notice on their website at http://intuit.taxaudit.com/. Do not contact the IRS until you have spoken to TaxResources. They may contact the IRS on your behalf.