Hi Deepali
If copa is active, revenue will post to copa. Okb9 is just a default and is used when no other cost object found
If you want biling to post only to Int order, assign it in your sales order account assignment tab
Note that in vkoa, you will need to maintain GL acct against Kofi and kofk both in that case
If you want it to post to both IO and copa, enter IO along with Prof segment in sales order
Br. Ajay M