I saved a default message for my invoices by checking the box below the message block. How do I shut it off? I don't want that message for every invoice I create

Hello there, @ceb4. I'm here to help you with your invoice message concern in QuickBooks Online (QBO).

In QBO, the text you entered in the Message on invoice field will be applied to all sales forms except estimates. To fix this, you can go to the Custom Form Styles page and remove the details entered there. Here's how:

1. In your QBO account, select the Gear icon and choose Custom form styles.
2. Next, open any invoice template by selecting the Edit option.
3. Go to the Content tab and click the Footer (third) section.
4. Then, delete the message under the Message to customer on section. 
5. The changes will be applied to all invoice templates. 
6. Once ready, select Done. 

For reference, feel free to read this article: Customize invoices, estimates, and sales receipts in QuickBooks Online. 

In the case that you need to add a message on some invoices, you can manually add it to the form. 

I also added this helpful resource that you can use as a guide once you're ready to record customer payments for invoices: Record invoice payments in QuickBooks Online.

If you have any other concerns about managing your invoices, please don't hesitate to leave a reply below. Have a good one and stay safe. 

I don't see that option when I open the gear icon