Please follow below steps to change your email address after logging in to your account:
Step1: Click on 'Settings' on top right.
Step2 On the settings page, click 'Change' button next to the e-mail address.
Step3: Enter new email address and click submit
Please note that this change will only effect for using your account of myITreturn.com and not in your return filing. If you want to change the e-mail address which you provided during your return filing, you have to change it from the wizard.