I'm using the PC version not online, though I see in the chart you linked it does show that Schedule C is included in Deluxe as well as Premium, so at least for online it suggests you don't need Premium.
Either way I looked back at my return last year and I did enter items for Schedule C box 27a as well as listing those items in Part V of Schedule C, and I did this with the same software package - TurboTax Deluxe for PC.
Did TurboTax reduce the functionality of the Deluxe software just for the PC version then? Or am I missing some way to add to box 27a? I'm able to do the rest of Schedule C through my current version.
