The Turbo® Visa® Debit Card is provided by Green Dot Corporation and is issued by Green Dot Bank pursuant to a license from Visa U.S.A Inc. Green Dot Corporation is a member service provider for Green Dot Bank, Member FDIC. Visa is a registered trademark of Visa International Service Association. Green Dot Bank operates under the following registered trade names: GoBank, Green Dot Bank and Bonneville Bank. All of these registered trade names are used by, and refer to, a single FDIC-insured bank, Green Dot Bank. Deposits under any of these trade names are deposits with Green Dot Bank and are aggregated for deposit insurance coverage. Green Dot is a registered trademark of Green Dot Corporation.

Santa Barbara Tax Products Group, LLC  (SBTPG) is the bank that handles the Refund Processing Service when you choose to have your TurboTax fees deducted from your refund. This option also has an additional charge from the bank that processes the transaction. 

You can contact them SBTPG, toll-free, at 1-877-908-7228 or go to their secure website www.sbtpg.com 

https://ttlc.intuit.com/questions/2580357-who-provides-the-refund-processing-service

Green Dot is a legitimate bank and does partner with Turbotax.  However, if you are unsure, you can call Green Dot or Turbotax customer service.

You might receive a Green Dot check if:

1. You requested your tax refund to be paid on a debit card, and the bank was unable to verify your information to issue a debit card, they would mail a check instead.

2. You requested your Turbotax fees be deducted from your federal refund, and the rest of your refund be deposited into your regular bank account, but Green Dot was unable to verify your information to make the direct deposit and mailed a check instead.