Did you have a federal tax refund and a state tax refund? If so, you will receive each tax refund separately and at different times.
Use the federal tax refund website to check the refund status - https://www.irs.gov/refunds
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
