my state refund was reduced. How can you help?

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. 

The state should be sending you a notice in the mail describing what they changed on your tax return which resulted in the reduction to the state tax refund.

TurboTax never knows about reductions to your refund by the IRS or state.   The state will send you a letter to explain why your state refund was reduced.   And...no, TurboTax does not and cannot find out anything from the state for you.  The state does not share any information with TurboTax after you file your tax return.

MY STATE REFUND WAS LESS THAN I EXPECTED

The state will send you a letter explaining the change.  TurboTax does not get any feedback from your state after your return is accepted, so no one at TT knows why your state refund was less.   Did you owe back taxes, child support, or student loans?  Traffic fines, etc.?

https://ttlc.intuit.com/turbotax-support/en-us/help-article/state-taxes/contact-state-department-revenue/L9qVToi02_US_en_US?uid=m6e06um0