If you closed the business in 2016 and did not have it at all in 2017, you can select “Business or Professional Activities” from the “Self-Employment” sub-menu in the “Income” tab. Click on “Delete” to remove the unwanted business, and all information pertaining to it.
you did operate the business in 2017, but it ceased operations that year, you
can “Edit” the business instead. Under “Identification of your business” at the
bottom of the page, answer “Yes” to the question “Is this your final year of
business?”. Then make sure the rest of the information reflects what happened
in 2017. Ex: You disposed of any property you formerly claim capital cost