Transactions do not have to be listed individually on Form 8949. Multiple sales can be summarized on one row of Form 8949 using adjustment code M, in addition to any other adjustment codes that apply. See Exception 2 under "Exceptions to reporting each transaction on a separate row" on page 4 of the IRS Instructions for Form 8949.
If you make summary entries ("Sales section totals") in TurboTax as I described above, TurboTax will put the totals on Schedule D lines 1a and 8a for those transactions that meet the requirements for those lines. For transactions that cannot be included in Schedule D lines 1a and 8a, TurboTax will make summary entries on Form 8949 as described in the IRS instructions.
