Are you in California? If you want to have the fees deducted from your federal refund there is an EXTRA 40 Pay with Refund service charge (45 in California) or you can avoid the fee by paying upfront with a credit card. That includes Premium Service which has Audit Defense.
How to review your fees
https://ttlc.intuit.com/community/charges-and-fees/help/how-do-i-review-my-fees-in-turbotax-online/0...
You get Audit Defense when you purchase PLUS Help & Support, MAX Defend & Restore, or Premium Services for Turbo Tax Online or Audit Defense for Turbo Tax CD/download
https://ttlc.intuit.com/community/choosing-a-product/help/which-returns-are-eligible-for-audit-defen...
So to remove Audit Defense you need to remove Plus or MAX or Premium Services,
Remove MAX
https://ttlc.intuit.com/community/downgrading/help/can-i-remove-max/00/26691
Remove PLUS Benefits
https://ttlc.intuit.com/community/downgrading/help/can-i-remove-plus-benefits-before-i-pay/00/26429
Remove Premium Services with Audit Defense for California filers
https://ttlc.intuit.com/community/downgrading/help/how-do-i-remove-premium-services/00/26266
This answer has been verified for accuracy by an Intuit expert employee
