We efile all our 1099s. Recently a vendor said that they had not recieved thier 1099. We ran our 1099's and sent the vendor a 1099 for 2012 information, updated our file and uploaded it to IRS. Next the vendor said they needed one for 2011 and 2010 which we provided after we checked the information for accurcy. Do we have to file a corrected file with IRS for those years and how would we do it since we efiled the original files with IRS?