I received a letter that I was being audited for my 2004 return. I promptly along with my tax preparer sent all of my receipts and proof. For the next 7 mo's I have been getting a letter each month that says "We are still reviewing". Then last week a get a letter that says nothing about my 2004 return audit results. But instead says We Changed your account - We changed your 2003 federal return because of your recent audit. Please see copy of report for detailed explanation. I have received NO such report and now they are trying to bill me $10,000 for 2003! Help! What can I do???