it's too late to attach a PDF of consolidate 1099-B because it's too late to e-File
still you can do a one-line aggregation by Form 8949 box category.
TurboTax calls this summarize and mail in option.
TurboTax will write "see attached" on your forms 8949.
You can attach a printout of your consolidated Form 1099-B when you mail in your paper tax return.
@xilex
Important: Detail Reporting Exception: if you summarize Category A or Category D, Form 8949 is not needed for transactions without adjustments. No mailing is necessary. No attachment is necessary.
