is this due to adjustments for wash sales, AMD etc? it depends how many sales you have.
if it's not many you are better off entering those items as a 1099 with "one by one" and provide the details which will go on Form 8949 and Sched D Line 1b (or wherever it belongs). You can split up the 1099 and enter anything that doesn't have an adjustment as a separate 1099B in TT using "sales summary" input but without any adjustment (No Form 8949, goes on Sched D Line 1a). This avoids mailing the 1099B details to the IRS.
If you have a lot of these items you can enter as a sales summary with adjustments and mail the details to the IRS.
When you make adjustment to a sales summary it will reflect on Form 8949 without the details and a description "see attached statement" and you will need to mail Form 8453 with the details usually in the form of the 1099B.
Generally TT encourages the adjustment of sales summaries and mailing of Form 8453 which can be avoided in a lot of cases.
