Yes, as a cleaning business, cleaning supplies are considered office supplies.

To get to the office supplies section in TurboTax Online, please follow these instructions:

1. Income (in the left-side menu ≡)
2. Self-Employment
3. Business or Professional Activities (Form T2125)
4. Click "Edit" next to the applicable business 
5. Continue through the screens. The office supplies section is about 19 screens in.

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