Has the format on the "Message on Invoice", changed? If so how can I change is back?

Hello user22341,

There isn't any changes on the "Message on Invoice" option. Let me guide you how to set a default email message for your forms.

Before we start, is your message box only shows one line? If so, we have a reported case about this and our engineers are still gathering data to get this resolved.

Please contact our support to get you added to the list of affected users. This way, you'll be notified when it's fixed.

Here's how to reach us:

1. In your QuickBooks Online, click the Help menu in the upper-right corner.
2. On the Search tab, click an article and select Contact us at the bottom. Then, enter the details of your concern.
3. Choose how you would like to connect with them: either via Callback or Chat.

Please check this article for our support hours: Get help with QuickBooks products and services.

To set up a default email message, please follow these steps.

1. Click Gear.
2. Click Account and Settings. Then, click Sales.
3. Click the Pencil icon in the Messages section.
4. Verify and edit your message.
5. Click Save, then Done.

See attached screenshot below.

Once done, try emailing an invoice again.

If you need some help articles for your future tasks, you can refer to this article about managing customers and income.

Drop a comment below if you have other concerns. We're always here to help.