Go to the book your dining reservation site on Disneyworld.com. Put in the confirmation codes and all of the information will come up. I tried putting in all of the confirmation numbers (it will prompt you saying more than one) but it didn't go through that way. Instead, I entered one at a time and they all came up. Then I printed them out. (Sounds harder than it is) You have to have your confirmation numbers handy before you begin.
If you didn't write the confirmation numbers down, call the Disney number and ask for dining. Ask them to give you all of your confirmation numbers.
Hope this helps.