See this TurboTax support FAQ for canceling an Advantage subscription - https://ttlc.intuit.com/community/downgrading/help/how-do-i-cancel-my-turbotax-advantage-subscription/01/25548
You mean you want to cancel your Advantage membership?
https://ttlc.intuit.com/questions/1901052-cancelling-or-refunding-your-turbotax-advantage-enrollment-and-order