The address is:
Internal Revenue Service
Attn: Shipping and Receiving, 0254
Receipt and Control Branch
Austin, TX 73344-0254
You have to attach the summary to Form 8453, which should have printed with your tax return.
You only have to do this if you made summary entries in TurboTax. If you entered the details of each sale in TurboTax, you do not mail anything to the IRS.
