If you reported individual transaction they are all sent to the IRS within 8949. If you did it summarily, you must send the detailed transactions to the IRS in IRS form 8453.
When you use the summary method, TurboTax only produces a Form 8949 with the summary totals that you entered, not the individual transactions, so the Form 8949 that is included in your return is NOT sufficient for this purpose. (Though, you can include it with the mailing as a reference)
You need to use Form 8453 to mail the brokerage statements that show the details of your transactions. Statements should include the following items for each transaction (these are usually reported on your Form 1099-Bs):
Description
Date acquired,
Date sold,
Sales price,
Cost basis,
Gain or loss for each sale,
Sale category based on how the sale was reported to you and the IRS, and
In some cases, there will be an adjustment code and adjustment amount.
NOTE: As discussed above, any sales summaries that include only Box A or Box D sales, and which have no adjustments to gain/loss, do not need to be included on a statement mailed to the IRS.
If you are e-filing your tax return, then mail your statements along with Form 8453 to:
Internal Revenue Service
Attn: Shipping and Receiving, 0254
Receipt and Control Branch
Austin, TX 73344-0254
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