If your books are less than 60 days old
These next steps are only for QuickBooks Essentials, Plus, and Advanced users. If you use QuickBooks Simple Start, you should cancel your account and start a new company.
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If you delete your company data, it won't cancel your QuickBooks or payroll subscriptions. However, you will have to reenter any employee or historical info you want to keep. This process completely clears out your books.
Important: Don't use these steps if you use QuickBooks Online Accountant. This will cause damage to your account that we can't undo. Instead, import a blank QuickBooks Desktop file to start over.
Delete your company data
Be careful. Before you start, be absolutely sure you want to delete everything.
Sign in to QuickBooks Online as an admin
Look at the URL in your browser's address bar. Delete all the text after the last / and enter purgecompany.
For example:
Before: https://...qbo.intuit.com/app/homepage
After: https://...qbo.intuit.com/app/purgecompany
To confirm you want to delete your company data, type Yes.
Select Wipe data.
Once the process is finished, you can start your books from scratch.