Some returns take longer than others. TurboTax gives you an estimated date for receiving your refund based on a 21 day average from your date of acceptance, but it can take longer.
Once your return has been accepted by the IRS, only the IRS has any control. TurboTax does not receive any updates from the IRS.
To track your Federal refund:
https://www.irs.gov/refundsTo track your state refund:
https://ttlc.intuit.com/questions/1899433-how-do-i-track-my-state-refund
