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.