When you create a Zoho Books account, you become the default admin of your organization. Once you are an admin, you can add multiple users with different roles to your organization. Here’s how you can do it:
Go to Settings in the top right corner of the page.
Select Users under Users & Roles.
Click Invite User on the top right corner of the page.
Enter the email address, name and the role of the user you’re going to invite to your organization.
Click Save.
After doing so, an email will be sent to the new user, from where they have to verify the link and set up a login password to access your Zoho Books organization.
Note: Only users with Admin access can add new users.