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Editing Confirmation Data in SAP SNC
Manually 
As supplier, you can manually create, change, or delete confirmation schedule lines of the Confirmed schedule line type for a purchase order item on the following Web screens for SAP Supply Network Collaboration (SAP SNC):
● Purchase order details
● Purchase order worklist
For subcontract orders, you can also report actual component requirements for the confirmation schedule line (after you have produced the end product and know the component requirements).

You cannot change the following objects:
● Request schedule lines of an item
● Confirmation schedule lines of the ASN-Confirmed schedule line type
SAP SNC creates an ASN-confirmed confirmation schedule line for a purchase order item if you publish an ASN with reference to the purchase order item in SAP SNC.
● The item must fulfill the following conditions for you to be able to edit a Confirmed confirmation schedule line for an item in the standard system:
○
Confirmation
control in SAP SNC permits confirmations for the item.
○ The item is changeable.
In the standard system, an item is changeable on the SAP SNC Web UI if the purchase order and item have the following statuses:
■ The purchase order has the Updated by Customer status.
■ The item status is Open or Partially Delivered.
■ The item does not have the change distribution status Published by Supplier. This status is relevant if the customer uses the approval process.
You define the settings for status-dependent changeability of purchase orders on the Web UI, in Customizing for Supply Network Collaboration, by choosing Basic Settings ® Changeability of Purchase and Replenishment Order Items ® Create Change Profiles for Purchase Order Itms and Replenishment Order Itms.
○ The item is not a statistical item.
When the supplier creates a confirmation
schedule line for a item, the system proposes the
confirmation-based due
quantity as the confirmation quantity.