A tax lien was filed January 2006. The amount of the lien filed was for $22,000. This lien has been on my credit reports for about 7 years. My documents do not support the amount above. My docs show at the time of the lien filing. I was owing about $32,000. I just received a letter, after being on a non collectible status for 7 years, and they are now saying I owe a total about $9,000, and due by April 15, 2013. Tax years 2002, and 2006. I do not know if this was triggered by a recent credit bureau dispute. I do not believe, their records are accurate. All my records for the years above contradict the IRS letter. I would appreciate some advice.