You can access the 1099-B worksheet from the forms mode in TurboTax. Just look for 1099-B Wks on the left side of your screen. Errors will show up as highlighted.
To switch to Forms Mode, open your return and click the Forms icon in the upper-right corner of your screen (or choose Forms from the View menu at top).
The 1040 Worksheet will display and all the forms in your return will be listed on the left side. Simply select a form to open it.
To switch back to the interview, click the Step-by-Step icon in the upper right corner, or choose it from the View menu.
