Hi @A1mobilenotary70601.
I appreciate your outputs shared in this thread. I understand how great it was from the old invoice interface where you can easily navigate and enter additional info on the Message on statement box.
Good News! You can see it now as the Internal memo box/field in the new invoice interface below the Note to customer field. Please take a closer look at the screenshot below:

So when you create customer statements, the detailed information in the Internal memo on each line for each invoice will show.
I'm sharing this article for more details about the three types of customer statements: Create and send customer statements in QuickBooks Online.
In addition, if you'd like to list each invoice transaction and add all the detail lines from it to show on customer statements, you can follow these steps:
- Click the Gear icon on the top right and then select Account and Settings.
- Go to Sales.
- From the Statements section, tick the List each transaction including all detail lines radio button.
- Hit Save.
Please let us know if you need more QuickBooks assistance. We're here to help 24/7. Keep safe, and have a great business year ahead!