Thank you for contacting us about deleting your account, STIGDUMP.
I can share important details about this process in QuickBooks Online. You can delete the data on your company file if your account is within 90 days after signup.
Once you delete the data, you're unable to restore it. If you want to proceed with the process, you can start by exporting lists out of QuickBooks.
After that, here's how to delete the data on the company file.
If your account has been active for more than 90 days, you're unable to delete the data. You have to cancel your account, then start a new subscription.
I'm adding these articles to help you with the process.