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sberant, my guess is resubmitting isn't an option.  I'd go with what you said in #2.    I sent them 3 relevant pages out of my 43 page 1099-B.  I think my problem was triggered by a K-1 which gave a different basis than the 1099-B, but I don't really know except I'm pretty sure my K-1 data is messed up and TT isn't too useful.  I figure if the IRS doesn't like what I sent them, they can ask for more, or send me a bill, or KMA.