The IRS can sometimes may mistakes. What does it say at this link: https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp
If it says accepted, what does the IRS tracking web site say about the status: https://www.irs.gov/refunds
Make sure you use the federal refund only when accessing the site and not the combined federal and state refunds.
If you can't verify that it was efiled and can't find it on the IRS web site, you will need to talk with TurboTax support directly for assistance: https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-contact-turbotax/00/26991
