You cannot make any entries directly on Form 8949 in forms mode. Individual sales or summary entries have to be entered on a Capital Asset Sales Worksheet. From there the information flows to a Form 1099-B Worksheet, and then to Form 8949 and Schedule D. Entering investment sales in forms mode is very complicated and error-prone. That's why TurboTax strongly recommends using Step-by-Step mode to enter investment sales.
