See this FAQ, it explains about why they will debit your bank account
https://ttlc.intuit.com/questions/2552376-what-if-my-federal-refund-isn-t-enough-to-cover-my-turbota...
It says.....
Note: If the IRS releases your refund after you've paid your TurboTax fees, we won't deduct your TurboTax fees twice. However, we still deduct the Refund Processing fee, if any.
