First the IRS is way behind in everything and why something took so long to get mailed to you is a mystery that will not be solved. They also give you a 30 day grace period after the requested date to comply with the notice so you have nothing to worry about. Chances are your response will sit in a pile of work and will not even get looked at for several weeks ... again don't worry. This happens to a few returns every year and you don't have anything to worry about ... they have the payment and that is the important part.
