CRA offers two ways to claim home office expenses: the detailed method and the simplified temporary flat rate method. With the detailed method, you calculate the percentage of your home used for work (by area) and apply it to eligible expenses. Eligible expenses for employees include utilities, home internet, maintenance and minor repairs, and rent. Your employer must sign Form T2200, confirming you were required to work from home and were not reimbursed. You must have worked from home due to your employment duties. Calculate your workspace as a percentage of your home's total area. Keep utility bills, internet bills, and your T2200. CRA recommends keeping records for six years.