<prompt> Human: Okay so I got an automated CP2000 letter saying I owe 2263. My biggest question is what does tax year 2013 mean exactly? I figured it was 2012 taxes 2012 taxes filed in 2013 because I remember having difficulties with a certain part in the education credits but Im not quite sure and want to be certain.First money on left what I filed, middle corrected is what the IRS changed, - far right difference to be summed up at the endEducation credits line 491358 corrected to 0 -1358Total tax line 61993 corrected to 2351 1358American opportunity credit line 66905 corrected to 0 -905Total tax I owe 2263Ill add an image with the other tax computations just in case but does their math make since?All help and information is appreciated :  <response>: Your subject line seems so happy!Tax year 2013 is 112013-12312013.I would assume you didnt submit supporting paperwork necessary to claim those credits or you werent actually eligible. Are you sure you were eligible to claim them? 