I see this is your first post so let me welcome you to the Community, @williamsbenjamin.
I can help walk you through deleting multiple companies in QuickBooks Online (QBO).
This can be done in just a few steps. Here's how:
1. Log into your QBO account and make sure have the account you'd like to cancel open.
2. Go to the Gear icon at the top, then pick Accounts and Settings under Your Company column.
3. Select Billing & Subscription on the left pane, the choose Cancel on the QuickBooks section.
Once done, you'll receive an email confirmation. You can do the same steps for your other companies. For your reference, you can also check out these articles for more information:
That should do it. Please let me know how it goes or if you have any other questions. I'm always here to answer them. Take care and have a good one!
