Hi Didac!
ClaessonEdwards is based in the USA. In the USA, this tax is called "Sales Tax", and with online purchases it’s only changed in certain states, and only when the resident lives in that state. For example, I believe someone from California who buys a product from us may have to pay sales tax on top.
In your case, the Spanish IVA is definitely not included in our price, however, the question is whether you’ll have to pay it at all when ordering from another country! This is a question for your business accountant, though — I am absolutely positively NOT qualified to advise you on Spanish tax law! 🙂
Best,
///Leif