can we add assets in tax books

We have performed data migration of assets to a client. In tax book, created the group assets to capture the depreciation and WDV value. When we copied those assets from corporate book to tax book, the WDV value of the group asset in the system isn't matching with the client's books. System is calculating it correctly. Client only has depreciation for a whole category of assets but not asset wise.

So we are thinking to add assets directly to tax book instead of copying with the depreciation values that client gives so that wdv value will be the value expected by the client.