Hi there, @Susan999. I'm happy to be of assistance.
Beforehand, I'd like to know more details about the things you want to know about former employees in QuickBooks Online (QBO). This way, I can provide accurate information and resolution for your concern.
I'll be waiting for your reply. Keep safe and healthy!
I'm here to ensure you're able to change the primary admin on your QuickBooks Online company.
You must be the current primary admin on the account in order for you to transfer the role to someone. If the person you're adding isn't a QuickBooks user yet, you'll have to add them as a new user. After that, you can already transfer the primary admin role to them.
Search for the user you want to make the primary admin.
From the Role column, ensure they are listed as Admin. If they’re not, click on Edit to change their role to admin.
Choose the small arrow ▼ in the Action section. Then, hit Make primary admin.
For security, we send a verification code to the phone number or email on file for your account. Once you receive the verification code, type it in and choose Continue.
Click on Make primary admin again to confirm the change.
Logout of QuickBooks.
The user should get the invitation email from us. Once received, ask them to click the link and accept the invitation to be the primary admin.