Internal orders

Hi Gurus,

We have a Ukrainian tax scenario where we need to raise a tax invoice when a downpayment is made and also a new tax invoice when the good are actually delivered (for the difference in VAT between the VAT from the downpayment and the VAT from the Goods Delivery Note). The problem is when we have multiple deals ie when the same customer has more than one deal going through at the same time - how can the system differentiate between the the downpayment for one deal and the goods delivered for another (for the same customer).

I wanted to know if its possible to raise the invoices against internal orders so that the different deals with the same customer can be handled. But I am not sure if this will work and if it is feasible from the payment perspective.

thanks,

Sanjay