You will need to file as self-employed if you did not receive a W-2 for this work. In TurboTax Online, click Wages & Income from the Federal menu. Expand the menu for Self-Employment. Click Start/Revisit next to Self-employment income and expenses. Enter the information on the screens that follow.
Here are some helpful articles about deducting business expenses.
Taking Business Tax Deductions
What self-employed expenses can I deduct?