Did you choose to pay any TurboTax fees out of your Federal refund, and if so, has the processing of your return at the IRS taken unusually long? If so, after a period of time, TurboTax would want to be paid for its fees, so it debits one's account. If that's your situation, you should have received emails asking for payment before that happened. See this FAQ for more info:
FAQ: Why was my bank account auto-debited for the TurboTax fees?
https://ttlc.intuit.com/community/charges-and-fees/help/why-was-my-bank-account-auto-debited-for-tur...