Holiday Entitlement Automation - Leavers & 1-Year Service

Is there a way for the system to automatically recognise the leaver and feed their accrued holiday balance into payroll, rather than requiring us to send a separate email to Bureau team each time. 

Also, employees receive an additional holiday once they complete one full year of service. The additional day should be added to their next holiday entitlement. The holiday year runs from Apr to Mar. Is there an automated option such as a rule/tick box to say that after the 12 months of service, an additional day should automatically be added instead of us emailing the bureau team.