You can deduct home office expenses from your salary (i.e. employment income)

If your employer requires you to pay expenses to earn an employment income then you can deduct most of your employment expense on line 229 of your personal Income tax return. You should maintain a good record keeping of all your expenses. Your employer must complete and sign form T2200 (Declaration of Condition of Employment) which you need to attach with your tax return. Depending upon your circumstances, you may be able to deduct following expenses: