Yes, the annual Ontario College Teacher membership fee is tax-deductible.
On your Personal Tax Profile choose "Yes" there other deductions such as public transit, union or professional dues, or alimony that you want to claim. Check the box the says "I paid union dues or professional fees".
Then under Deductions and Credits under Payment profile, you will find Union or Professional Dues. This is where you would enter the Ontario College of Teachers fee amount.