The IRS releases most refunds within 21 calendar days after the e-file has been accepted (received), not 21 days from the e-filing date. For mailed returns, allow 5-6 weeks from the postmark date.
Wait 24 hours after your federal return has been accepted before looking it up at Where's My Refund? See also Where's My Refund FAQs.
To check the status of the state refund, click on your state at the following FAQ:
https://ttlc.intuit.com/replies/3300211
