You are an Independent contractor and must report all income as taxable even if it is less than $600. Even if you do not get a Form 1099-MISC, the income, whatever the amount, is still reportable.
You will need TurboTax Self Employed
In the BUSINESS section
Enter the income of $600, even though you didn't get a tax form
Then enter your expenses.
Where do I enter Schedule C?
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"