The Schedule C itself only has one line for gross income (line 1). Everything goes there. Turbotax asks about different kinds of income, partly because the IRS will be looking for your various 1099 forms. If Turbotax asks you to separately enter your 1099-MISC and 1099-K forms, this income doesn't go there, it just goes with "other income not reported on a 1099" (or however the interview labels it.)
