A 1099-B composite means that it has several forms listed and often all on one page. Usually the 1099-INT, 1099-DIV are together on a page. You probably have a bigger section devoted to 1099-B showing your sales. You could have even more, OID, MISC, etc. You will need to enter each into the section of TurboTax where it belongs.
All of these parts will be under the income section of TurboTax. Just a question of which ones you have to determine where they go.