when sales proceeds and/or cost are not furnished to the IRS you need to enter each completed transaction on form 8949 or enter summary totals. if you enter summary totals then the iRS requires you to submit the details of each completed transaction in a format that mimics form 8949 along with form 8453.
If you are filing your tax return using an online provider (IE TURBOTAX), mail Form 8453 to the IRS within 3 business days after you have received acknowledgment from your intermediate service provider and/or transmitter that the IRS has accepted your electronically filed tax return. If you don’t receive an acknowledgement, you must contact your intermediate service provider and/or transmitter.
Mail Form 8453 to:
Internal Revenue Service Attn: Shipping and Receiving, 0254 Receipt and Control Branch Austin, TX 73344-0254
failure to submit transaction detail can be construed as filing an incomplete return. whether the IRS does anything about this is up to it.
you can download form 8949 from the IRS website and prepare it manually.
https://www.irs.gov/pub/irs-pdf/f8949.pdf
