Possibly a day late but....the instructions to the 1040-X will tell you which revision to use depending on the tax year being amended.  Some computations reported on 1040-X were not the same in different revisions depending on the tax year being amended.  Also, be aware that the 1040-X in ProSeries (regardless of the software tax year) is not always the current one if the IRS has released an updated revision but not the software schema to allow PS to do the same (I believe).  Have dealt with the same issue a few times now and it took PS almost a year before they had the correct revision in the tax package for that year.