Hi,

I've got almost everything working now. I can create an invoice, and I can add invoice lines to them.

Every line has a link to a product and the link to the VAT is correctly mentioned.

But:

When I create a draft invoice manually and save it, on the additional information tab is a line about VAT

When I create a draft invoice from my program, on the additional information tab is no line about VAT

I have no clue where to look for the difference. When I dump all invoice and invoice line data of all invoices and invoice lines I can find no difference. 

Is there some method I need to call after I am done with the invoice so the system can somehow create this invoice line on the additional information tab?

Regards,

Jeroen