How to in input long term capital gain 1099-B?The 1099-B section does not clarify long or short term gain???

The purchase and sale dates will determine short or long term. Assets held a year or less will be short term.

are you sure because not only do you need it the IRS needs it to check your reporting? contact the broker for clarification

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generally every 10((-B I've seen segregates long-term form short term and then breaks done these classes on how reported to IRS  code A - short-term and code D - long-term proceeds and cost reported to iRS

codes B and E except only proceeds reported to IRS

codes C and F not reported too IRS

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however if you using a foreign broker they are not required to conform to IRS reporting requirements