Deductions & credits

I'm in the same boat.  I can report expenses on Schedule C, but if I don't report any income then TurboTax will not allow home office expense.  If I qualify as a day trader, how can I successfully input all my expenses (including home office) on Schedule C without inputting any income since income is already captured on Schedule D?   Is there a way to override on Schedule C, or do I just need to do this on the desktop version?  Thanks