Purchase Invoice Advise

jimmyf

Hi There
I need some advice on how to raise a purchase invoice. I need to develop an integration with a third party application which will export purchase invoice data to Nav (Nav 2013 GB)
I will develop an XMLport to import the data and create the Purchase Invoices.

The purchase invoice lines will be GL account lines.

The problem is that the lines from the third party application are net of VAT as their system does not include VAT at line level. It can only calculate VAT at an invoice level against a total for each VAT rate included in the lines.

My question is what is the best way to create a Purchase Invoice in Nav to facilitate this and how should I handle the VAT inside Nav

Thank you in advance