Line 130 - Other income contains taxable income not included in other categories. Common sources of other income include scholarships/bursaries, retiring allowances, lump-sum payments, death benefits, and payments from a Registered Education Savings Plan (RESP).
This CRA website has more information on Line 130 - Other income: https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/tax-return/completing-a-tax-return/personal-income/line-130-other-income.html
If you are still not able to find where your other income comes from, please contact our phone support for further assistance. You can get the correct number by using this form: https://support.turbotax.intuit.ca/contact/