Hi MarilynsLLC
Please, do not write in Caps. This is considered as you are screaming 🙂
When you receive your items from any PO in Purchase Orders PRO, you can create deliveries (full or partial). And, thereafter, you can add the items to stock from that delivery, and it will increase the WC stock automatically.
You have more info in the documentation:
https://stockmanagementlabs.crunch.help/en/atum-purchase-orders-pro/po-deliveries-1
Best Regards,
Salva.