First, click on the Business tab, then select Business Income & Expenses, then I'll Choose What I Work On. Then you'll choose the section called Business Income and Expenses, and Profit or Loss From Business. If you already have your business listed in TurboTax, then click Edit and you'll be taken to the business summary page (if you haven't already entered any information on your business, then you'll set that up first).
From the business summary page entitled Your Business, scroll down and click on Business Income. You'll select the second section in the Business Income list, entitled General Income. You'll see a grid with two columns: Description and Amount. This is where you'll enter your various 1099-K forms, one at a time. If you like, click on the blue-colored "Learn More" link to open up a window showing a handy explanation of Form 1099-K.
