Hello btb1!
I've got options for you to start with a fresh QuickBooks company.
If your QuickBooks company is not more than 60 days old since you signup, you can purge it to wipe out your data. To do that, just log in to your account and add /purgecompany to the last part of the URL. The confirm the deletion of our records. You can find more details in this article: Delete your data and start over in QuickBooks Online.
If you've been using QuickBooks for more than 60 days, I'd suggest signing up for a new account again. Just use your existing username and password.
Let me know if you have more questions about starting over again.
