The income your daughter earned is considered self-employment income by the IRS.
Let's clarify a couple of points to make sure you're going in the best direction.
Your daughter's return can be prepared using IRS Free File delivered by TurboTax.
She will need to report the income from the Form 1099-K on Schedule C.
She also can claim deductions to reduce the amount of income that is subject to self-employment tax.
If the $714 is her only income, she will have no income tax to pay but she will have self-employment tax unless she has expenses to lower the amount of taxable income.
She likely has expenses such as microphone, headset, computer, internet.
If her expenses are $314 or more, she will be under the amount that she would have to pay any self-employment tax as well.
