Created corp. in 1998. No business conducted in any way after 2000. Former accountant called IRS to stop demand letters and they said write a letter (about assets) stating that all the assets were sold and the corp no longer was conducting or connected to any business or income as of the end of 2000. Wrote the letter and the letters stopped until 2008 when out of the blue the IRS is now demanding payment on tax period 9/30/01. The corp was defunct at that time and the letter stated that. Now what? Interest is being added and apparently they are disregarding my previous arrangement made by my accountant when they requested the letter. Now it seems if I pay for this period they will then want payment for every quarter after that until the present even though the corp is non-existent and it can be proven has no assets and no business of any sort since 2000. How do I deal with this even though I have never legally closed the corp.