I wish I could make it better, @Studying_Nomad.
As of the moment, there isn't an integrated way to turn off the pop-up messages while in QuickBooks Online. In the meantime, it is recommended to click the X, No thanks button to close them.
With the said option is not available, I'd recommend letting our product developers know about your request by sending feedback. You can do so by following the steps below:
- Go to the Gear icon.
- Select Feedback.
- Enter a few words describing your request. Say Turn off prompt messages related to ads.
- Click Next.
On top of that, here's a couple of articles you can read helpful in keeping you up-to-date with the latest software improvements and enhancements:
Keep in touch if you need any more assistance with this, or there's something else I can do for you. I've got your back. Stay safe!