We closed the S-Corp at the end of April 2013. We had no idea that we were supposed to file taxes by the 15th day of the 3rd month after closing the S-Corp. We figured that since the 1120S form is related directly to our personal return, that we should file the S-Corp return in the spring of 2014 along with our personal taxes. Well, that's what we did and it prompted the IRS to send us a "Fail to File Timely" fine. So now we have to deal with this imposed fine since we were the only two shareholders of the S-Corp. I have heard from an accountant that they can't collect on a business that is closed. We have found similar forums about fines for closed S-Corps with unpaid payroll tax liability, but no definitive answer for our situation. Are my wife and I personally liable for this IRS fine?