How can I amend the outgoing memo on the payment received copy to my clients?

Hi there, 

QuickBooks Online makes it easy to edit customer messages. I'd be glad to show you how to set that up.

To do this, please follow the steps below:

    1. Select the Gear icon on the Toolbar.
    2. Under Your Company, choose Account and Settings (or Company Settings).
    3. From the left menu, select Sales.
    4. In the Messages section, select the edit (pencil) icon.
    5. Place a checkmark in the box next to Use greeting, then from the drop-down choose your ideal greeting.
    6. In the Sales Form drop-down, select the desired Sales Form type:

•         Invoice
•         Estimate
•         Credit Memo
•         Sales Receipt
•         Statement
•         Refund Receipt

    7. For the Subject and Email message, you can leave the verbiage in the box that is provided or type in your own custom messages.
    8. If you would like to receive a copy, place a checkmark in the box next to Email me a copy.
    9. After you've made all the appropriate changes to the message, select Save.
    10. Select Done.

For more information on editing memos of your sales forms, check out this helpful article here. Let me know if you have questions.