You must have something inadvertently entered in the Schedule C section; it doesn't have anything to do with your standard deduction.
To check your Schedule C:
1. Click Federal on the left-hand side
menu.
2. Click Income across the top.
3. Scroll down to Self-Employment and
click Show more.
4. Click Start or Revisit by Income
and Expenses.
Go down your expense list to
Other miscellaneous expenses to clear out your phantom entry.