Scheduled Maintenance: Support Platform unavailable on May 19, 2024, from 3:00 a.m. to 6:00 a.m. ET
A schedule maintenance has been scheduled on Sunday, May 19, 2024, from 3:00 a.m. to 6:00 a.m. ET. During this window, our support platform site at support.cch.com/oss/canada and its services will be unavailable.

Web tickets and live chats are given priority over calls
For a faster service, connect to our Support Platform to create a web ticket through our virtual assistant who will either offer you to submit your case or to chat live with an agent. Consult this article for more details: How do I create a support case or initiate a live chat?

Most consulted articles in the Knowledge Base (as of May 14, 2024)

1. How do I prepare an amended federal T1 return to transmit it electronically (EFILE)?
2. CCH iFirm - How to merge two CCH iFirm sites - Migrating data from one CCH iFirm site to another CCH iFirm site
3. T3 - Is Form T3A, Request for Loss Carryback by a Trust is transmitted electronically, Efile?
4. CRA reassessed T1 return 2023 for advanced canada workers benefit (ACWB).
5. How to do a second amended T2 return?
6. How do I amend the T2 tax return with iFirm Taxprep T2?
7. T1 2023 - CRA- RQ How far back can you transmit a T1 and a TP1 tax return, amended return - Auto-fill - Electronic services prior years’ support?
8. Diagnostic E19 is displayed in a T2 return saying to verify for any tax changes after a certain date.
9. How to add a licence or security role in CCH iFirm