Post-Brexit, couriers are required to collect and process your VAT payment at the time the goods are delivered. We use DHL for all our non-palletised international shipments because their processes, tracking, and costs are more reliable than the other couriers.
Before your goods are delivered, you will be contacted by DHL for your VAT payment based on the value of your goods. This will be the VAT rate applicable to your country. If you are VAT registered you can claim back the tax in the normal way you reclaim domestic VAT.