Once a tax return has been Accepted by the IRS or a State, TurboTax receives no further information concerning the tax return or the status of any tax refund.
You should be receiving a letter in the mail from your state explaining what they changed on your state tax return that resulted in the lower state tax refund.
Or you can contact your state department of revenue to find out if they have an explanation.
See this TurboTax support FAQ for contacting a state department of revenue - https://ttlc.intuit.com/turbotax-support/en-us/help-article/state-taxes/contact-state-department-revenue/L9qVToi02_US_en_US?uid=lvtohkgv