Are you self-employed or are you an employee?
I am an employee both commission an paycheck
You can only claim maintenance and minor repair costs which relate to the part of your house you use for work. You can't claim capital expenses such as replacing windows, flooring, furnace, etc. or wall decorations.
However, if you renovations included things to help make the home more accessible for a senior or disabled person, then you might be able to claim some credits. This TurboTax article has more information: https://turbotax.intuit.ca/tips/home-accessibility-tax-credit-hatc-5198
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