Yes, we can turn it off, @Zalmy.

We can turn off the auto invoice reminder by going to the Gear icon in QuickBooks Online (QBO).

Here's how:

1. Go to the Gear icon.
2. Under Your Company, select Account and settings.
3. Click the Sales tab.
4. Select the Reminders edit pencil icon.
5. Click the Automatic invoice reminders to off.
6. Select Save and then Done.

If you need help managing your customers and sales, check out this article: Sales and customers.

Don't hesitate to drop a comment below if you have other questions. I'm more than happy to help. Take care!