It can take a few days for the funds to be released and posted by your bank to your account.
Please see this IRS FAQ under: https://www.irs.gov/refunds/tax-season-refund-frequently-asked-questions
What is happening when Where’s My Refund? shows my refund’s status as approved?
We’ve approved your refund. We are preparing to send your refund to your bank or directly to you in the mail. This status will tell you when we will send the refund to your bank (if you selected the direct deposit option). Please wait 5 days after we’ve sent the refund to check with your bank about your refund, since banks vary in how and when they credit funds.
You won't get any answers from TurboTax. They'll blame it on the IRS, they'll blame it on your bank-- whatever it takes to avoid taking responsibility. They will not give you any answers online or by phone. I recommend using another service next year; call 211 for a free tax prep service near you!
On the date of your expected deposit date, the exact timing of that deposit and availability of the funds is generally up to your bank. At this point the IRS has given you the only information they can (a deposit date) and so your bank may be able to provide additional insight regarding the timing of the deposit.
If there is a problem with the deposit, and it is returned, the IRS will automatically mail a check to you - typically within a few days and they will reflect that information in the status available here: Where's My Refund? (IRS).
Once your return is filed, TurboTax does not receive any additional information about your refund. We do not process your refund, so we don't have any information about the status of the deposit.