Hello, Mr. customer.
Allow me to share an idea of when you can void or refund a transaction in QuickBooks Online.
QuickBooks Online keeps track of daily transactions and batches them all at the same time. Settlement happens when the batch closes at 3:00 PM PT. If you process a transaction after 3:00 PM, you can void it until 3:00 PM on the next day.
You can only void the transaction if the payment hasn't been batched. If you can't void it, you'll need to give your customer a refund. You can use cash or other means for a refund.
You can review the steps through this resource for your reference: Void or refund transactions in QuickBooks Payments.
In case, you'll want to process a refund, I'd suggest reaching out to our QuickBooks Payments Team. They'll be able to pull up your account and submit a request to refund your payment.
In addition, you can check these articles below for more insights:
Stay in touch with me by commenting below whenever you need additional information managing your transactions in QuickBooks Online. I'm always around to help.
