If you have any EFILE Online or EFILE Online Plus questions regarding error messages and/or authentication problems for EFILE numbers and passwords (including those for T2 EFILERS), please make every attempt to contact your designated EFILE Helpdesk at the phone number indicated on your EFILE Renewal/Registration Confirmation page or as listed below.
For all other questions please contact the applicable enquiries telephone number.
Designated EFILE helpdesk contact information
If you do not know which tax centre to contact, check the following Web page for T1 return processing workloads.
Technical support is available through online features on this Web site. We encourage you to use these facilities, which deal extensively with topics such as Web browsers, cookies, and root certificates.
We also maintain a News page that has messages for the electronic filing community.
If you have hardware problems, such as computer or modem malfunctions, refer to your hardware manuals or contact the vendor. If software is causing the problem, refer to the developer's manual, help line, or Web site.
If you have comments or suggestions on improving EFILE Online services, please feel free to send us an email. The emails are not monitored on a constant basis.