You cannot deduct your prior year Investment Management Fees this year, you must make an "adjustment" to each year's tax return in which the fees were incurred.
You can only deduct expenses in the year that you paid for them. Each tax return reports finances for its own year and each of those years needs to be kept separate. Deductions, income or anything else from a previous year cannot be claimed with the current year's tax information.
https://turbotax.community.intuit.ca/replies/2647992