1099-B with 100s of transactions

[wallacedk]

Can I summarize the 1099-B transactions and then attaché the PDF to the efiled 1040?

[dascpa]

You have multiple options. If the 1099-B has summary totals for each category (A - short-term covered, D - long-term covered, etc.) then you can just put in those totals. 

There is also with Form 8453 a way to enter in summary totals and then within 3 days, mail with the 8453 the supporting documentation.

And yes, some people do the attachment as you said, but it's the input totals by category that are the most important.

[dkh]

Look at page 11 of  IRS Schedule D instructions for line 1a and 8a  

[IRonMaN]

I'm surprised that this question still pops up so often after all of these years.

[ljr]

totals for short term covered, short term noncovered, long term covered and long term noncovered

if the pdf would be a very large file you can check the box on schedule d to kick off form 8453 and mail a hard copy of the brokerage report 

[abctax55]

To be a bit more specific, only the NON-covered transactions have to scanned/attached - or mailed.

And be on the lookout for any wash sales on those & adjust accordingly.