Turbo Tax has no control over direct deposit except for providing the information you entered to the IRS with your return. What transpires after that is between the IRS and the bank. If there was any information incorrectly entered in Turbo Tax for direct deposit and the transfer can't be made, the IRS will automatically send the refund check by mail. You might want to check with your bank to see if the IRS attempted to direct deposit but there was an error. Perhaps your routing number was incorrect or has changed? If any of the direct deposit information in Turbo Tax is incorrect, you will need to fix that for next year.
Please see the link below with notice from the IRS regarding direct deposits, errors and policy.
https://www.irs.gov/faqs/irs-procedures/refund-inquiries/refund-inquiries-18
https://ttlc.intuit.com/replies/3302459
