I don't think there is a box that says "I did not receive farm income".

I one I see most often is "I have farm income from operating a farm".

If you have a schedule F in your forms and you don't want it, you can easily delete it by going into the forms mode, find schedule F and open the form page. You should be able to find a Delete Form tab on that page. On a Mac version, I think it is on the top header bar but not sure.