A client for which I filed a T3 electronically received a notice of assessment with a $100 penalty for failure to file schedule 15 by the deadline. T3 return was electronically filed on 01 Apr 2024, and did include S15. I contacted CRA and agent advised they are aware of issue.
For my client, I am thinking of filing an objection on a pro bono basis just to protect their rights, as I am not sure how long CRA will take to resolve.