Go look at an actual Form 8949 here:
https://www.irs.gov/pub/irs-pdf/f8949.pdf
where you'll read
"Short-Term.
Transactions involving capital assets you held 1 year or less are short term. For long-term transactions, see page 2.
Note:
You may aggregate all short-term transactions reported on Form(s) 1099-B showing basis was
reported to the IRS and for which no adjustments or codes are required. Enter the totals directly on
Schedule D, line 1a; you aren't required to report these transactions on Form 8949 (see instructions)."
If you're day trading - and you just about have to be - and you didn't adjust anything from what the broker reported, then you're done.
