Every GSTZen account is tied to the email address used to create the account. Hence, changing the email isn’t a viable option.
You may de-activate the account. Once the account is de-activated, you will no longer be able to log in to that GSTZen account. If you wish to activate the account again, please contact GSTZen support.
Not necessary. From your GSTZen account please send an Invite to your new email address. Using the invite link, sign-up to GSTZen. This process will add the new email address as a user in the same account. You will now be able to access your GSTZen account with the new email address.
For instructions on how to invite a user into your GSTZen account, please see the article – Invite User to your GSTZen account
You may provide admin access to different user(s) before your email address is deactivated from GSTZen. On the permissions management page, right-click on the username and click on Make Admin. This will make the other user admins as well. You may provide admin access to multiple users if need be.