If the state reduced your refund, only they can tell you why. They will probably send you a letter explaining the reduction. If you don't get a letter in a week or two, you will have to call the state to ask for an explanation. To get contact information for your state tax agency, go to the following link and click the name of your state.
https://ttlc.intuit.com/questions/1901670-how-do-i-contact-my-state-department-of-revenue
