After you file

@DaveF1006 

Thank you, but my question is not that, my question is: What is done in his scenario where he had over 500 to 800+ pages in transactions with and without adjustments (which were entered as summary as you described). Since the summary format was selected, one has to mail all 500 to 800+ pages with the 8453? 

 

In that sense, what in specific has to be mailed?:

   - All pages of 1099B (which was sent to the IRS by the broker)?

 

Thank you in advance.