Where is the basic Leave feature which is 'missing'?

Where is the basic Leave feature which is 'missing'?

hi,

i am ERP, Absence consultant and currently evaluate the feature of Zoho People.
Here my few queries,
  1. How to pro-rate (leave accrual) Leave entitlement
  2. how to carry forward leave balance to next year entitlement
  3. how to manually adjust leave entitlement