Let me guide you on changing your business name and removing duplicate companies.
With QuickBooks Online (QBO), you can rename the company you recently created for your desired precision. You can do that by following the steps below:
Go to the Gear icon.
Select Account and Settings.
Under the Company section, click on the pencil icon to edit.
Enter the name of your organization in the Company name.
Hit on Save, then Done.
On the other hand, the option to delete a duplicate company in QBO is unavailable. Instead, you can cancel your subscription, which you'll only have view-only access to your data for a year.
Here's how you can withdraw your subscription that has been purchased directly from Intuit:
Inform me in the thread if you have additional questions about updating your business information and dealing with duplicate companies in QBO. We're always here to help.