You’ll enter the income reported on your Form 1099-K as ‘Additional income’ along with any cash or checks you received as self-employment income.
Here's how to enter your 1099-K:
Note: You’ll need to be using TurboTax Deluxe or a higher version of TurboTax to enter a 1099-K. You’ll be given the option to upgrade if this applies to you.
Form 1099-K gives a Gross Amount - What does this mean?
If you're entering income from a 1099-K, remember that this form reports the gross amount of the transactions. It doesn't include any adjustments for credits, refunds, discounts, fees, etc. You’ll have a chance to enter any business expenses like fees and all other expenses in another part of your return.