Yes. You can change the email address with which you access your Zoho Books organization. You can find the list of scenarios and the the corresponding steps you could use to change your email address.
Case 1: If you’ve signed up for Zoho Books using your personal email address and plan on using your organization email to access your Zoho Books account.
In this case, you can change the email address by following steps mentioned here.
Note: Kindly make sure that the email address to which you wish to switch shouldn’t already have a Zoho account.
Case 2: You’re in the paid plan and you wish to access your Zoho Books account using another email address.
To add a new email address, kindly follow the instructions below:
Note: The sender’s email address in the email templates will not be changed automatically, after this action. You need to manually update the sender’s email address there. Please refer to the steps in this Link to do the same.