Thanks Ilango,
I will proceed as follows:-
1. Will use separate document pricing procedure for Quotation and SO.
2. Will enter condition type to be adjusted manually in Billing Document with zero value in SO.
3. In VOFA will activate check box posting block so that accounting document will not create automatically.
4. Will maintain the amount to be adjusted / deducted in Billing document as negative value.
5. From VF02 will release the Billing document for accounting.
Please advise is the above steps are OK or not. If you finding any technical issue also please let me know.
Thanks
Abdul