Kokua Line: Why won’t state automatically refund GET overpayment?

Question: I have questions about state tax overpayments. I am a preparer who does GET and individual taxes for clients. The only overpayment that is automatically refunded to the taxpayer is the individual tax on a yearly return. Please help me understand why the state does not issue an automatic refund when a taxpayer overpays their GET tax. The tax office, also, does not include the credit on the subsequent required filing, but, rather, the credit for overpayment sits in the taxpayer’s a