How to check the checkbox : match bill to receipt On PO ?? When I want to check that , the field is grey And what is that

https://docs.oracle.com/en/cloud/saas/netsuite/ns-online-help/section_N2371184.html#:~:text=To%20mark%20a%20purchase%20order,the%20setting%20on%20item%20records.

Thank you but it’s only working for inventory item ??

Yes, Inventory items are what you receive on Item receipts, there can be other items that have can be fulfilled/received box mark checked