Dear Venu
As you are aware system will not considers Proforma--as Billing Document technically.
If you see the coding in VF04--System will captures the Billing Document categories like
M,N,O,P Etc...into VF04-- But not U-Proforma invoice.
We need to know the exact meaning of Proforma here: this is just a dummy document which doesn't carries any value (only to show to the local authorities)...
Hope this helps.
Still if you want to check--take a copy of TAN (Ex.ZTAN)and change its billing relevance to D(from A)--do the cycle upto Delivery--then check VKDFS table/VF04--update me.
Again this time---take a copy of TAN (Ex.TAN1)and Dont change its billing relevance (from A)--do the cycle upto Delivery--then check VKDFS table/VF04--update me.
Hope this helps.
Phanikumar
