After you file

Yes they are on my 1099-B. I guess investing in a publicly traded limited partnership is confusing.  Basically I received my K-1 in the mail, and then got an amended 1099-B from my broker.  The LP company on my original 1099, now moved into the "Unknown Term Gains or Losses" section."    What's weird is, under the "Unknown Term Gains or Losses" section  there is only an amount in the "Proceeds reported to the IRS" column, no cost basis or profit/loss columns completed though.  Not really sure what to do or if I should amend....thanks for your help