I helped my sister put together a CP2000 reply and faxed it for her with all the backup info. Her CP2000 was for $214,400 (yes, you read that right) for taxes and interest and penalties on the sale of her (and her husband’s) home. There actually is no tax liability because the profit was below the primary residence exemption but that number got your attention! Her deadline date is Dec 23rd and the response was faxed 12 days ago. I guess I will have to call and confirm although I did get a confirmation from efax. Nerve wracking.