Thanks for keeping us updated, @KOS. I'm here to guide you in allocating your Non-Sufficient Funds ( NSF ) or bounced check to the correct register in QuickBooks Desktop.

Once you record a returned check from your customer, QuickBooks will generate a journal entry ( JE ) that marks the invoice payment as a bounced check. To correct this, access the JE and the payment. Then, change the bank account for both so the NSF check is allocated properly. Let me show you how:

1. Open the Customers menu.
2. From the Customer center, locate and select your customer's name to open their transaction list.
3. Find the payment and click on it.                                                                
4. In the Deposit to drop-down, choose the right bank account to which it should be added.                                             
5. Once done, click on Save & Close, then Yes to confirm.                                                                                               
6. After that, go back to the Customer Information page and open the journal entry.                                
7. Modify the bank account to the right one.                                      
8. Finally, click on Save & Close.

Find out more details on how to handle Non-Sufficient Funds (NSF) or bounced checks from customers.

If you're all set, feel free to read this additional help module about managing and getting copies of your checks:  Create, modify, and print checks in QuickBooks Desktop.

It'll always be my pleasure to assist if you have any other concerns besides working with QuickBooks. Please let me know by clicking the Reply button and leaving a comment below. Take care and stay safe!