Here’s how to edit your Form T2125 if you're using TurboTax Online:

Click on the “Find” icon in the top right and search for “Self”. Select “Self-Employment” and then click the “Go” button.

Click “Continue” until you see a list of your businesses.

Click “Edit” next to the business you want to work with.

If you want to delete the business entirely, click “delete” next to it.