In order to claim any Employment Expenses for supplies you must purchase yourself, you must meet the following CRA requirements to claim them:
"You can deduct the cost of supplies you paid for (or that were paid for you and included in your income) if you meet all of the following conditions:
- Under your contract of employment, you had to provide and pay for the supplies.
- You used the supplies directly in your work.
- Your employer has not repaid and will not repay you for these expenses.
- You keep with your records a copy of Form T2200, Declaration of Conditions of Employment, which has been completed and signed by your employer.
Supplies are only those materials you use directly in your work, and for no other purpose."
A copy of the form can be viewed at this link: https://bit.ly/2SYZF0c and the complete CRA guide to Employment Expenses here: https://bit.ly/2Ve3BM1
