TurboTax doesn't do anything with your stimulus check, so they will not be putting your check on a card instead of the bank account you specified when you filed. The payment comes direct from the IRS to you. The IRS will use whatever bank account you entered on your tax return. If you need to change your banking information, you will have to wait until the IRS opens a portal on their web site, www.irs.gov, for you to enter new information.
