Does anyone know what the typical IRS penalty fees are for correcting an error in a 1099-B? The 1099-B was sent out October 2018 and I just spotted the error August 2019. The error is to the stock 'Acquired Date' which currently reads the stock was acquired in 2016 but it was actually acquired in 2013. Thank you in advance for your help. Our start-up (the acquired company) made the error in our cap table (it's what start-ups do), it was not the fault of the acquirer.