Investors & landlords

Thank you.  I had already completed Form 6252, but didn't know what to do to address the 1099-B, as it was adding the full gain to current year.   I did note that Box 6 did not have checked either the "Net Proceeds" or  "Gross Proceeds" and Box 12 was also not checked, so was thinking maybe the company didn't actually report the 1099-B.  Thanks for your help!