You can make changes to PO’s that are not on contract or from a hosted catalog vendor by completing a Change Order Requisition in Workday. You can request the following changes for any non-contract/catalog PO:

• Add a line
• Increase or Decrease Line Amount
• Change Driver Worktag or Spend Category
• Cancel Line, Cancel Purchase Order 
• Close Purchase Order

Review the “Change Order Request” Job Aid in ServiceNow