Form 8949 (Sales and Other Dispositions of Capital Assets) records the details of your capital asset (investment) sales or exchanges. Part I of the 8949 shows the short-term transactions (held less than a year) and Part II has the long-term transactions.
When you enter investment sales or exchanges from Form 1099-B or 1099-S in TurboTax, we'll automatically fill out Form 8949 and transfer the info to Schedule D. You don't need to fill out the 8949 yourself.
See this article for more information.
Form 8949 is supported in all CD/Download software versions of TurboTax and in the online and mobile app versions of TurboTax Premier, TurboTax Live Premier, TurboTax Self-Employed, and TurboTax Live Self-Employed.