Every state has their own time frame to process refunds. However, 90 days for an e-filed return is longer than typical. You can contact your state's Department of Revenue and ask for an explanation. If you mailed in your tax return then 90 days is possible as mail in returns take longer to process.
Click the TurboTax link below to check the status of your state refund or for contact information for your state's Department of Revenue.
https://ttlc.intuit.com/questions/1899433-how-do-i-track-my-state-refund
