If you have a T2200 form that shows some of your work-related expenses, but not all of them, you may still be able to claim additional expenses on your tax return.
You should carefully review the list of eligible work-related expenses provided by the Canada Revenue Agency (CRA) and determine if you have any additional expenses that meet the criteria for deduction. If you do, you can include these expenses on your tax return, even if they are not listed on your T2200 form.
Work-space-in-the-home expenses: percentage of thehome expenses related to earning income
However, it's important to note that you must have receipts or other documentation to support any expenses that you claim on your tax return. Additionally, you should only claim expenses that you have not already been reimbursed for by your employer.