If your income is below $3500, claim them as other income:
- On the top bar, click on the magnifying glass to open the search window
- type "income not reported on a T-slip"
- Select occasional earning (the first choice) on the Employment Status Page
- On the "Other Employment Income Sources", specify the type of income and the amount
If your income is more than $3500, you will need to report it on the T2125 business sheet:
- Search for "self-employed" in the search engine on the top bar
- Choose the type of business income you are reporting
- Then fill in the necessary information on the business statement page
- You will be able to claim expenses against this income
For more information on how to fill your T2125 business sheet, check this link:
https://turbotax.intuit.ca/tips/t2125-tax-form-declare-income-and-expenses-from-a-business-or-profession-394
I hope this was helpful