Hi there, katie-hill.
 

I can definitely see how an option to turn off suggestions could be useful for some users. As my colleague, MirriamM, mentioned, there isn't a setting which makes these tips not display.
 

I've gone ahead and sent feedback to our Product Development Team about this. If you'd like to submit your own suggestion, you can while signed in.
 

Here's how:
1. Use your Gear (⚙) icon.
2. Click Feedback.
3. Enter your suggestions and/or comments.
4. Hit Next.

5. Choose Skip and send message.
6. The available drop-down menu can be used to pick an appropriate category.
7. Select Send message.

Your feedback is definitely valuable. Once submitted, it will be reviewed and considered in future updates. Feature requests can be tracked through our Customer Feedback page.

You'll be able to stay up-to-date with the latest news about QuickBooks Online in Intuit's What's New in QBO Archives.
 

If there's anything else I can help with, feel more than welcome reach out anytime. Have a wonderful day!