From: AFA Elines

Flight Attendants who elected to receive their W-2s electronically may now access their W-2 forms by logging into United's Flying Together website through Employee Services > My Info > Continue to My Info and Manager’s Toolbox > W-2 or by visiting www.paperlessemployee.com/united. If you are having difficulties accessing the electronic W-2 service please contact United Payroll Care Center at 1-877-UAL-ESC9 (825-3729).  

Those Flight Attendants who have not opted to receive an electronic W-2, will receive their printed W-2 forms via U.S. mail prior to the required postmark deadline of January 31, 2016.