As per the Canada Revenue Agency (CRA):

You can deduct any reasonable expenses you incur to earn your daycare income.

Regarding expenses related to Office stationery and supplies, you can deduct the cost of the following:

• supplies, such as toys, books as well as arts and crafts items that the children in your daycare use
• household supplies that the children in your daycare use, such as blankets, towels, toothbrushes, diapers, and shampoo
• food you buy to feed the children in your daycare

Report the total expenses for supplies and food on line 8811 of Form T2125, Statement of Business and Professional Activities.

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