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Thanks for visiting the Community space, tazdev10.
Do you mean you've accidentally created a new account instead of adding a Standard user in QuickBooks Online (QBO)? If so, you can cancel the newly created account by following the instructions below:
For more details about canceling your subscription, you can check out this article: Cancel your QuickBooks Online subscription or trial.
Once done, you can start adding the Standard user to your existing account. I'll show you how below:
If you have other questions, just let me know. I'm always happy to assist you further. Have a great day ahead.