How to update inventory on hand value

Starting balance qty is not showing while creating the items in inventory and also in version 18.10.96 how to update inventory value?

For starting balances, read the Guide: https://www.manager.io/guides/5497. Remember, though, that starting balances are only used when migrating to Manager from a previous accounting system.

What do you mean by updating inventory value? Inventory value is calculated automatically based on the starting balance (if any) and purchases made since.