If you have not received the subscription confirmation email or the return email, first check your spam or junk mail folder. If you have not done so already, add the email@example.com email to your safe senders list or contacts.
If the email was not received, you can contact IRD at 800-TAXX (8299) and select option 1 (e-services) to request that the email is resent. You will be asked to verify your contact information, the returns you are requesting and the email address(es) provided at registration to which the email will be resent. A response will be received within one (1) business day of your request.