You don't have a 401k from Europe. You might have a similar type of arrangement, but it will be set up under the laws of your home country, and the taxes will be determined by exactly what kind of account it is, what country it is. Please give us those details.
@pk
At worst, it will be fully taxed in the US just like withdrawals from a US 401k. However, there may be other possible outcomes, depending on the facts.
