Hi there, jearn,

QuickBooks Online lets you remove companies you no longer use. To do so, you'd need to cancel those companies. They'll disappear from the list after 365 days.

There are just a few steps to get this done.  Here's how:

1. Sign in to QuickBooks Online as an admin user.
2. Go to Settings ⚙, then select Account and Settings.
3. Select Billing & Subscription.
4. On the QuickBooks section, click Cancel subscription.
5. Follow the steps on the screen to cancel your subscription.

Once done, an email will be sent confirming that we've canceled your subscription.

I've added a quick video tutorial for your guidance with the process above.

You can also refer to this article: Cancel your QuickBooks Online subscription for more details.

Let me know if there's anything else you need. I'm always glad to help you out.