Yes, you will pay SE taxes on any Sch C profits ...
To enter your self employed income & business expenses:
1. Type “Schedule C” in the Search box.
2. Select the “Jump to” link.
o If this is your first time working in this section: You’ll be asked some questions about your self-employment work, and then have a chance to enter your expenses.
o If you have already entered some information about your self-employment work:
§ Select Edit next to your business, and confirm your general business info if asked.
§ Select Add expenses for this work OR, if this your first time entering expenses, select Continue on the Let's get the deductions...screen.
§ Follow the screens to enter your expenses.
TurboTax CD/Download Home & Business - Follow these instructions to enter your expenses.