You would file for both types of employment on the same return.
I assume you received a W2 from you first job. For that income you will enter it in TurboTax following the questions for W2 income, in the Personal Income Section.
The remaining income would be reported on a Schedule C. To enter that income go to the Business Income and Expense section and enter your earnings and any related expenses.
You may want to upgrade to the Home and Business version if you do not have it. TurboTax will guide you through this.