EFILE Helpdesk support
For any EFILE web service questions regarding error messages and/or authentication problems for EFILE numbers/passwords (including those for T2 tax preparer for EFILE), please contact your designated EFILE Helpdesk at the phone number indicated on your EFILE Renewal/Registration Confirmation page or as listed below.
For any problems with the Auto-fill my return login process, contact the Individual income tax enquiries line.
For questions, or help filing your T2 Corporation income tax returns, please consult the Corporation Internet Filing Help Desk phone numbers and hours of service.
For all other questions please contact the applicable enquiries telephone number.
If you have comments or suggestions on improving EFILE Online services, please feel free to send us an email. You will not receive a reply, but we will review your comments.
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