Procurement Parameters
To enable the retro-billing functionality in Infor LN, select the Retro-Billing check box on
      the Parameters 2 tab in the Procurement Parameters (tdpur0100m000) session and define the data
      in these fields:
  - Number Group for Retro-Billing Advices
 - Series for Retro-Billing Advices
 - Retro-Billing Cost/Service
 - Date for Generating Retro-Billing Advice