Who files
Revenue’s own wording is that this applies regardless of the value of the goods or services, so even a single small sale to an EU business customer brings the obligation.
Revenue requires a VIES statement from Irish VAT-registered traders who zero-rate goods, services or both to VAT-registered customers in another member state. There is no minimum value. The statement lists each customer’s VAT number and the value supplied to them, which lets the customer’s tax authority check that the VAT is accounted for at their end.