Hi Ardie Trinidad ...
Administration
--> System Initialization--> Document Settings--> Per Document
Purchasing Documents Fields - Purchase Order
Split PO Select to determine whether to split a purchase order that relates to more than one warehouse.
If you select the checkbox, SAP Business One prompts you to create child purchase orders. Confirm the message to create separate child purchase orders for each warehouse.
Split Purchase Order
Enables you to divide purchase orders that involve more than one warehouse.
Regards
Kennedy