As per Canada Revenue Agency (CRA): You can claim professional membership dues required to keep a professional status recognized by law. This link provides a CRA explanation for: Annual union, professional, or like dues.
You can ask the CRA directly at 1-800-959-8281 to get a better understanding of why they remove CPSO, CFPC, OMA, and CMPA professional dues in your Notice of Reassessment.
Please visit our TurboTax FAQ: What employment expenses can healthcare professionals claim through TurboTax? to learn more about what employment expenses you can claim and how to claim them.