Thanks for getting in touch with us, Larry.
The option to turn off invoices and estimates isn't available in QuickBooks Online (QBO). These features are functioning as intended and are a standard part of your subscription package.
Since you mainly use Etsy, the best way to deal with this is to ignore the prompts for creating invoices or estimates. You can carry on with your work and dismiss these notifications when they pop up.
If you want to automatically transfer your entries from your Etsy shop into QBO, check out this article for more guidance: Import transactions from your Etsy shop into QuickBooks Online.
Feel free to hit me up again if you have any other QBO-related concerns. I'm always glad to help. Take care!