In general, you need one schedule C for each business. You can combine similar businesses on one schedule C, but if you have different businesses you need to keep the income and expenses separate. For example, if you drive for Uber, Lyft and Doordash, you can combine that on one schedule C under "ride share" since the income and expenses are similar. But if you have a lawn care business and drive ride share on the weekends, those need to be under separate Schedule Cs.
