The fastest way to make this change is to go into Forms mode. Click the Forms icon, then click on the Federal icon. Select “Go to T1 page 1”, then click OK. In the “Email Address” section, double click on the email address that is there. It should take you to the INFOWS page where you can change the email address.
Then you can click on the EasyStep icon to go back to the interview, and save your changes.