VAT on EU import by UK company to Northern Ireland Customer

I import a product from Italy and usually just use postponed accounting rules. However, I have just had an order from a customer in Northern Ireland. The goods were sent to the customer directly from the factory in Italy. The Italian supplier has sent me an invoice for the goods which includes 22% Italian VAT. Their explanation is “The total amount is with Italian VAT (22%) because the goods go to North Ireland and this is a CEE final destination. For us it is neither and export an a intra-community transfer.”

I am unsure how to post this in Quickfile, any advice would be appreciated.