This annual leave should have been used no later than the end of April 2017. To support the system implementation, a decision has been taken not to enter any carry forward annual leave into iTrent for 2017. You should therefore only enter your contractual entitlement for 2017, which will either be 27 days or 31 days in total.
Please agree with your line manager, when entering your annual leave, which days are considered to be your carry forward days and do not enter these within iTrent.