Let's isolate what causes the issue, dan112.

There are times that an issue like this occurs when the system encounters browser-related concerns.

To start with, let's open QuickBooks in a private window. It is the best place to identify any browser-related issues. You may use these keyboard shortcuts to open one:

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Microsoft Edge: Ctrl + Shift + P
• Safari: Command + Shift + N

If it works, you can go back to a regular browser and clear its cache. A piled cache can also be the reason for some unexpected behavior on the opened pages.

You can also switch to a different supported browser like Google Chrome, Mozilla Firefox, Safari, or Microsoft Edge.

If you want to send a balance forward statement, you can check this reference: Add an account summary to an invoice in QuickBooks Online.

I'm just a post-away if you need help. Keep safe!