You can sign into your TurboTax Advantage account and under Your Product, select to remove product. Once you remove the recurring product order, the TurboTax Advantage subscription will be cancelled, as well.
How to cancel Turbo Tax Advantage or get a Refund
https://ttlc.intuit.com/community/downgrading/help/how-do-i-cancel-my-turbotax-advantage-subscriptio...
