Hi Balajia
The rebate process supports retroactive processing.
If you have activeate the new rebate procedure (via S136) you can run VBOF and as long as the
validity of the agreement and the agreement conditions cover this document created before the agreement the rebate condition will be inserted in the billing document and posted to FI.
If you do not have the new rebate procedure activated it is not possible to update the old document
but if it falls within the validity of the agreement it wil be included in the final settlement of the agreement carried out via VBOX.
Notes 75778 and 105681 in addition to 410579 should help you clarify the issue.
Hope it helps
Kind regards
brian