I'd be glad to share steps on how to add another admin in your QBO account, kayfisher.
Just make sure that you're logged in as the admin so you can add a user. Here's how:
Go to the Gear or Settings ⚙ icon, then select Manage users.
Click Add user.
Select Company admin, then click Next.
Enter the name and email address of the new user.
Click Save.
Once done, inform the new user that they will receive an email from quickbooks-email@intuit.com. It has your business’s name and a message that includes “Ready to get started? Let's go!"
Let them click the "Let’s go!" link and they will be routed to sign in or account creation page. They need to sign in or enter info to create a new account. Here's an article about this process for more details: Add and Manage Users in QuickBooks Online.
Additional guidance and information about user management are also discussed here: