FYI they are not required by law to give you this information until Jan 31. The accounting office may not be able to send it right away. They can find you by name and SS# so do not worry about your associate number. If you cannot put it online without a number just put zeros in that spot.
W-2 are sent from corporate and they have until 1/31/2015 to send them
You contact them back, give them an address they can send the W-2 to via mail and that's all you need.
w's won;t be ready until mid January - they do NOT get forwarded by the post office for privacy/identity protection reasons. if you moved - you must give them your new address