To change the amount listed as “Other Income”, you would first have to find out where it comes from.
Line 13000 - 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). Box 66 or 67 from your T4 slip would also be considered as Other Income.
Please see this TurboTax FAQ for more information: Other income: what is it and why does it appear on my income summary page in TurboTax online?
If you have TurboTax Live Assist & Review, see this TurboTax FAQ to learn how to talk to a Tax Expert or book a review: In TurboTax Live Assist & Review, how do I talk to a tax expert?