If you are self-employed, you can
claim your expenses in the “Self-Employment” section of the interview. Click on
the “Find” icon in the blue menu and search for “self”. Select “Self-Employment
Summary” and then click the “Go” button.
If you are employed and you have
a T2200 form from your employer, you can claim your expenses in the Employment
Expenses section. https://turbotax.community.intuit.ca/replies/2647650