Schedule C, Profit or Loss from Business tallies up the business's income and expenses, and the net income (or loss) flows from Schedule C to Form 1040, Line 12. So adding expenses to Schedule C is correct. However, if you want to change the category of where you entered an expense, here are the steps:
- Sign into your TurboTax account and click "Take me to my return"
- In the Search box (upper right of program) search "schedule c" and click the "Jump to" link from results
- Select Edit next to your Business and scroll down the next page to Business Expenses
- Select Start/Update next to Other Common Business Expenses
- The following page will list common business expenses including Supplies (click on screenshot below for detail)