If Progress Payment was split between two banks, and only part of the payment was applied to the open invoice, how do I correct this without voiding something?

Hello there, @Bobbie51. I'm here to provide information on how to address this situation.

To avoid voiding any transactions, I recommend editing the amount and bank account in the recorded invoice payment in QuickBooks Online (QBO). Let me guide you through the process:
 

1. In your QBO account, go to the Sales tab, then select All Sales.
2. Locate the invoice that was partially paid, then click on the yellow exclamation mark to view the partial payment.
3. Select the View payment to edit.
   
   
    
4. Choose the bank the partial payment is deposited to in the Deposited to field.
5. Enter the amount received from your customer in the Payment field.
6. Once ready, click on Save and close.
   
   

To use a different bank account to settle the remaining balance, you can record an additional payment for the invoice. Here's a step-by-step guide on how to do it:
 

1. In your QBO account, click on +New, then select Receive payment.
2. From the Customer dropdown, select the name of the customer.
3. Select the payment method from the Payment method field.
4. From the Deposit to dropdown, select the bank account you put the payment into.
5. In the Amount received field, enter the amount your customer paid.
6. In the Outstanding Transactions section, select the checkbox for the open invoice you're recording the payment for.
7. Enter the Reference no. and Memo if needed.
8. Once ready, click on Save and close.

For detailed information, kindly visit: Record invoice payments in QuickBooks Online.
 

Additionally, you may find this article helpful in customizing your sales forms and adding specific information: Customize invoices, estimates, and sales receipts in QuickBooks Online.
 

It would be greatly appreciated if you could share your progress by posting your update below. I'm fully prepared and at your service to provide any necessary information.