This is a section of the 1099-B that is not importable mostly because the brokers do not make that info available and you must make entries in the 6781 form interview which cannot be gleamed from the broker's statement ... it is your responsibility to review all entries for accuracy prior to filing ...
https://turbotax.intuit.com/tax-tips/investments-and-taxes/what-is-form-6781-gains-and-losses-from-s...
