If the cost basis is marked as being reported to the IRS, all you have to do is enter totals and you don't need to attach anything.

Thank you very much for answering my concern question.

Here's wishing you a great Tax Year.

Sillysyl/ TaxWiz

If all of the transactions are covered with no adjustments you can skip the 8949 entirely and just put the totals on Sch D directly (lines 1a and 8a).  If they're scattered, smothered, chunked, topped, diced, peppered or capped that may require different reporting.