Proseries isn't likely *asking* for the Sch C.  It's more likely you entered it in the software indicating self-employment income.    

But I only speak Lacerte; a PS user will need to stop by with the specifics of where a 1099-MISC should be entered.

Put it on 1099 MISC worksheet. click on the green ?, and type in 1099 MISC

enter it as a 1099MISC and check the Other Income box, Im not sure why people feel they're forced to choose Sch C, there are various choices available