You have to wait for the state to process, approve and send the state tax refund.
If accepted by the state use this TurboTax support FAQ to check the state tax refund status - https://ttlc.intuit.com/questions/1899433-how-do-i-track-my-state-refund
I have the same problem . State accepted at Feb 15th . But still i don't see a return to my account yet .
The 21 days is not a magic number. That is a number used by the IRS as a Target to send the federal tax refund. That has nothing to do with a state tax refund.
@Prejith Some states take a long time to issue refunds. Other states are pretty fast.
Federal and state refunds come from completely separate entities, There is no rule as to which one will come first or how much time there will be between their arrivals.
STATE RETURN
Make sure your state return was accepted: https://turbotax.intuit.com/tax-tools/efile-status-lookup/
To track your state refund:
https://ttlc.intuit.com/questions/1899433-how-do-i-track-my-state-refund