You can purchase audit protection for this year's tax return (as well as past years) to make sure you have audit representation when you need it. It's best to do this through TurboTax, before you've filed your taxes.
Audit Defense is included in MAX Defend & Restore, which can be purchased any time before you file.
If you’re using Free Edition without PLUS, you can also purchase Audit Defense without adding MAX Defend & Restore.
You can also purchase Audit Defense after you've filed your return, provided you haven't been audited yet. Simply go to the TurboTax Audit Defense website to sign up.