Your school shares a faculty list with the publisher. Ask that you be included on this list so that when you request information your employment can be easily verified. Adjuncts and new professors may ask the university to send NITA your first time request on university letterhead to open the account. ISBN is an abbreviation for International Standard Book Number. It's a ten digit number, and is a publishing standard used for identification.
Every book has one.
It can be found under the copyright information and on the back cover of the book. Or, you can simply ask your NITA representative for this number. Each university sets its own deadline. Universities normally have an educational coordinator on staff who is responsible for verifying registration and submitting your requests to the bookstore. This is the proper procedure to use if time permits.