The third party designee section will remain blank. If you're audited by the IRS, a dedicated expert will represent you, including talking to the IRS. Once you receive an audit notice, contact the audit defense team immediately. Your tax return is covered for as long as it can be audited.
Please see the TurboTax FAQ about audit defense.
https://ttlc.intuit.com/replies/3301996
https://ttlc.intuit.com/replies/4842238
