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Most Consulted Articles in the Knowledge Base (as of April 30, 2024)
  1. EFILE ERROR 110-B: T1 return is rejected with error code 110-B for newcomers
  2. How do I attach files to my case on the ''support.cch.com/oss/canada'' Support Platform?
  3. The federal T1 return is rejected by the CRA with error code 43 in Taxprep or CCH iFirm Taxprep T1.
  4. How do I update my support case on the ''support.cch.com/oss/canada'' Support Platform?
  5. CRA EFILE ERROR 16, how to fix it
  6. The federal T1 return is rejected by the CRA with error code 70127.
  7. How do I register to the new ''support.cch.com/oss/canada'' Support Platform?
  8. How do I prepare an amended federal T1 return to transmit it electronically (EFILE)?
  9. The federal T1 tax return form is rejected by the CRA with error code 2197.
  10. How do I transfer unused tuition fees from a child to a parent in Taxprep or CCH iFirm Taxprep
  11. The federal T1 return is rejected by the CRA with error code 2252.
  12. The Québec TP1 return is rejected by Revenu Québec with error code TSTRUC.
  13. How do I reset my password on the ''support.cch.com/oss/canada'' Support Platform?
  14. T2017 Where do we enter the reserve amount of capital property in the first year for dispositions that are not QFFP, QSBCS, or to your child?
  15. Is the Home Office product supported?
  16. How do I transfer the disability amount for a dependant to the reporting taxpayer on line 31800 of Schedule 1?
  17. Where to enter a RL1 for a Ontario Resident?
  18. When launching the application, the message The location of the transmission database is not properly specified or is unavailable. Would you like to specify it now? displays.
  19. The federal T1 return is rejected by the CRA with error code 43 in Cantax T1.
  20. How can I download old version of Cantax or Taxprep or Aliform programs?
  21. How to clear cache in Taxprep, Cantax and AliForm?

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Documents/ Links
Release Notes (419.0 kb) 2023-May-29
Installation Procedures (354.9 kb) 2023-May-29
Release of AliForm 2023 v.2.0 2023-May-29