how to remove old user - primary admin from Quickbooks?

You can send a request to our account protection team if you need to transfer the role to yourself, Karolina. If someone else needs the role, they should send the request instead. I'm here to assist you with the process.

Here's what to do:
 

1. Gather documents for your request.
2. Complete the form.
3. Get ready to send your request by completing the form.
    

Please check out this link for additional guidance about the procedure: Request to be the primary admin or contact.

Once the review is complete, our dedicated team will promptly review your case. When finished, you'll receive an email update regarding the status of your request. Keep an eye out for an email from no_response@intuit.com.
 

For more insights on changing the primary admin or contact user in QuickBooks, review the details provided in these links:
 

• Change the primary admin user in QuickBooks Online
• Change or update the Primary Contact on your QuickBooks Account
   

Furthermore, here are articles that outline the steps for adding and restricting user access in QuickBooks:

• User roles and access rights in QuickBooks Online
• Add and manage users in QuickBooks Online and Intuit Enterprise Suite
   

If you require further assistance while making changes to the primary admin user in your account, please don't hesitate to ask your questions in the comment section below. I'm here and ready to assist you once more. Have a good one.

@Karolina-Jakubowska 

Another option, purchase a 3rd party service to migrate your data to a new QBO account.