Is it possible to change the wording on the email my customers receive.

Hello there. I'm glad to have you here in the Community.

We can change the default message in your invoice emails to anything you'd prefer. Let's work together on updating it.

Here's how: 

1. Go to the Gear icon, then select Account and Settings. 
2. Click the Sales tab, then scroll down and find the Messages section.
3. Once you've located it, click its Pencil icon.
4. Choose Invoice in your Sales form drop-down menu.
5. Customize the message in the Email message field.
6. Hit Save, then select Done.

After saving changes, your customers will see the default text you set up when you email them invoices.

If what you are referring to is different, please let us know in the comments section so we can provide you with the appropriate solution. Any additional information will be highly appreciated. 

Additionally, you can check out this article to learn how to personalize and add specific info to your sales forms: Customize invoices, estimates, and sales receipts in QuickBooks Online.

Let me know if I can be of additional help with customizing your invoices or if you have any QuickBooks-related queries. Keep safe.