I went ahead and input a summary of my total capital gains/losses in Turbotax under 1099-B since my number of individual transactions exceeds the limit allowed by Turbotax.
There's a message showing below my summary however which seems to indicate that I'll need to mail form 8453 along with form 8949 (depicting every single one of my transactions individually) to the IRS since I chose to summarize on 1099-B.
If I have to print and mail form 8949 this way, it would be a minimum of 500 pages, if not 800+. Is this really necessary?
