Generally personal legal fees are not tax deductible in most cases except the circumstances provided below;

You can claim your expenses in any of the following situations:

You paid fees (including any related accounting fees) for advice or assistance to respond to us when we reviewed your income, deductions, or credits for a year or to object to or appeal an assessment or decision under the Income Tax Act, the Employment Insurance Act, the Canada Pension Plan, or the Quebec Pension Plan. 

You paid fees to collect (or establish a right to) a retiring allowance or pension benefit. However, you can claim only up to the retiring allowance or pension income you received in the year, minus any part of these amounts transferred to a registered retirement savings plan or registered pension plan. You can carry forward, for up to seven years, legal fees you cannot claim in the year. 

You incurred certain fees to try to make child support payments non-taxable. Fees relating to support payments that your current or former spouse or common-law partner, or the natural parent of your child, paid to you must be claimed on line 221. You cannot claim legal fees you incurred to get a separation or divorce or to establish custody of or visitation arrangements for a child. For more information, see Guide P102, Support Payments.