Yes, you can void your created refund check to ensure financial records are accurate and there are no discrepancies, @Deb067. Let me guide you on how to void it.

To begin, voiding the check will preserve a transaction record without affecting your account balances. Before proceeding to void the check, please take note of the transaction details for your records. Then, follow the steps below to void:

1. Go to the Customers menu and choose the Customer Center. 
2. Select the specific customer for whom you want to void the check.
3. Double-click the refund check you created and select the Void option.   

Afterward, you can proceed by following the steps outlined by my colleague, which involve Writing checks and linking the customer credit through the Receive Payment process.

However, if you prefer to reuse the same check or check number, you'll need to clear the line items in the Items tab and utilize the Accounts Receivables in the Expenses tab. Here's the process to follow:

1. Locate and double-click the refund check you created.  
2. Leave the Pay to the Order of field blank and clear the line items.  
3. Go to the Expenses tab and select Accounts Receivables.  
4. Enter the amount, add a memo, and select the specific customer.  
5. Review your entries to ensure accuracy.  
6. Finally, click Save and Close.

Next, create a receive payment to link the customer's credit balance with the check you generated. Here's how:

1. Under the New Transactions menu, choose Receive Payments.
2. Select the check you created in the Customer Payment window.
3. Click the Apply Credits link located below the Customer Payment.
4. Verify the Available Credits line item.
5. Finally, click Done, and then select Save and Close.

You might find this article helpful if you're dealing with an error, overpayment, or underpayment that requires additional time to collect or settle the amount owed: Write off customer and vendor balances.

For future reference, you can check this article for guidance on efficiently monitoring your customers' sales and expenses, which will help you maintain accurate financial records: Customize customer, job, and sales reports in QBDT.

You can count on the Community team for assistance with handling refunds and voiding checks in QuickBooks. If you have any other concerns, please feel free to reply in the thread below. We're here to support you and are eager to help.