If you no longer want the Advantage subscription see this TurboTax support FAQ for cancelling the subscription - https://ttlc.intuit.com/questions/1901052-how-do-i-cancel-my-turbotax-advantage-subscription
Or do you mean you have three online accounts for tax return prep? If so, pick one and stick with it. But keep a record of how to access the old ones in case you need to get to one of them someday. TurboTax accounts cannot be combined.