FapiFapo wrote:

It was my first puchase since a long time, and i haven't noticed the box "Opt-in to pre-pay EU VAT"

Conclusion : ALWAYS check the box, pass the message to your friends.

Indeed, the box to prepay VAT is not obvious at first sight!
@Anniepan, Fasttech should make it more visible, by enlarging and highlighting it!

Yes FapiFapo, always check the box, it will save you a lot of trouble!

As for me, I'm waiting for a replacement for a defective item I received in a previous order.
FT has put the old IOSS number on the package, so it will be a new experience with a replacement item! (With a value of $00.00)

I'll be back here to report how it went with customs when I receive the package.