Most refunds are received within 21 days from the time a return has been accepted (received). However, some returns take longer than others. It's possible your return may require additional review and take longer to process.
The IRS Where's My Refund? site is updated daily usually in the evening hours. You can also call the WMR Hotline at 800-829-1954 for updated status.
Please see the TurboTax FAQ When will I get my IRS refund? for more information.