I'd be happy to provide you with more insights regarding Intuit Assist in Quickbooks Online (QBO), Twelve.
The option to turn off the Intuit Assist is unavailable in QuickBooks Online (QBO). If you prefer not to use this feature, please avoid clicking the Business Feed button. This will allow you to navigate our platform without engaging with its functionalities.
For now, I recommend sending your feedback to our product engineers, as there's no option to opt out of this feature yet. They take customer feedback seriously when planning future improvements in QuickBooks' processes. Here's how:
1. Go to the Gear icon.
2. Under Profile, select Feedback.

3. Enter your suggestions and click Next.
You may be interested in exploring the latest updates for estimates and invoices in QuickBooks Online. Feel free to read this article: See what’s new with estimates and invoices in QuickBooks Online.
If you have further questions regarding the new AI assistant, feel welcome to ask here on our forum. We're more than willing to assist you. Stay safe and have a good one.