Extras -> Text, where is it determined (FB03)

Hi,

I am having a problem with the extras text section in FB03. I made a FB70 document (DM type), tax code B2 (mexico tax)one customer, when I go to FB03 ti display it, in the tab "Extras->Text" information is coming.

But when I do that same document with tax code VS, no Extras->Text info is coming up. Where do I set this up so I can correct this? The only thing that changed from one document to another was the Tax Code, and of course the tax account.

Where is this determined? This info is used then to get the printouts correct so it's pretty critical for us.

Thanks in advance!