If the state did not send a notice explaining the change which made your refund into a balance due then contact them ... there should be a phone number on the notice.
I AM BEING AUDITED
If you purchased Audit Defense:
https://ttlc.intuit.com/questions/2924451-i-bought-max-or-audit-defense-and-now-i-m-being-audited
AUDIT SUPPORT
If you did NOT purchase Audit Defense:
https://support.turbotax.intuit.com/irs-notice/audit-support/
