You can create a new godown called - Damage and do stock journal entry to move damage items to this Damage godown.
dear sir we have already six godowns in six godown we have damage stocks while billing how can we come to know this item is damage
As suggested first create a Damage godown. After this transfer all damaged articles lying at various godowns to this damage godown with the help of Stock Journal with Transfer class. With the help of a TDL you can restrict access to damage godown to any user and thereby you can prevent billing from this godown. At periodical intervals, like once in every month remove damaged articles through a journal voucher debiting Loss of goods account and crediting Damaged goods account. Loss of goods account should be created under indirect expenses account and Damaged goods under a new group called Damaged goods itself. This group should be created under primary group and Nature of group under income. 'Does it affect gross profit' should be 'Yes'. While creating Damaged goods ledger, Inventory values are affected should be yes. In the journal voucher after selecting Damaged Goods ledger, an inventory allocation screen will appear,here you can select each of the damaged goods, their quantity and also give a rate. You have to also select the Damaged godown under godowns for removing these items.