Your state should be sending you a letter in the mail within a few weeks after the tax refund was issued explaining what they changed on your state tax return to arrive at the state tax refund you received.
Or you can contact your state department of revenue and see if you can get information now about the state tax refund. See this TurboTax support FAQ for state department of revenue contacts - https://ttlc.intuit.com/community/state-taxes/help/how-do-i-contact-my-state-department-of-revenue/0...
