Are you entering investment sales in forms mode in the CD/Download ("desktop") TurboTax software? Entering investment sales in forms mode is very complicated and error-prone, and requires the use of multiple worksheets. You are probably not using the forms correctly. If you're having trouble, it would be best to wait until the investment sales section of the Step-by-Step interview is available, then use the interview to enter your sales. It is tentatively expected to be available January 4.
If you have further questions, please tell us whether you are using TurboTax Online or the CD/Download TurboTax software. And are you using Premier or Premium?
