In most cases, international orders will be shipping from the US to the destination country. Currently, the UK is the only country that taxes/duties are calculated and pre-charged at the checkout, meaning there will be no additional duties to pay.
Whether you will be charged import taxes and duties will depend on each individual country's import tax laws. As we do not charge these in advance, it will be the recipient's responsibility to pay these charges once their order arrives in the country. Generally, you will be notified at the time of delivery if there are duties to pay in order to have your package released.