MWST Missing in Billing.

Dear All,

Request you help. I am getting an Error for Missing "MWST" while creating a Billing Document.

MWST is determining correctly in Sales order but when I am trying to do Billing MWST disappear and system is giving an error for missing MWST.

I am getting this error in Production for all the order. however I have replicated the same senario with same masters in Quality and it is working fine.

Request your help.

Regards,

Rikin