Unfortunately, you won't be able to resolve anything account-specific in a user community forum. You'll need to phone TurboTax Support to ask them how MVB (Credit Karma's bank) became involved and how you ended up with an account there. I left contact info above.
Also ask them what should happen next, or if you need to actively withdraw it from MVB. While you have them on the phone, also ask them how to contact the relevant department at MVB in case you need it.
