I'd like to ask about a notice I received from the IRS today. The notice requests more information about a certain line and correction of figures on a certain column on my 2013 amended tax return. I double checked for arithmetic, consistency, and accuracy, but all the figures seem to be correct. In addition, I checked copies of the documents I mailed and confirmed that I'd sent all necessary forms.
However, on my IRS record of account transcript, I noticed that swathes of numbers were filled in as "$0" where they shouldn't be. In addition, I saw that my amended tax return was filed and sent for processing in April and my original tax return was filed in June (nothing about processing).
Of course, I mailed the amended tax return after the original tax return. Is it possible that I got this notice as a result of the amended return somehow getting filed before the original return?