B Set

I'm going to be distributing a new new mobile app in the next couple weeks. There's a paid version and I was wondering if I have to take international tax laws into consideration (IE - do I have to pay a separate tax on apps sold in Spain).

I'm hoping someone may know the answer from experience or be able to point me in the right direction. Also - would the revenue type matter, ie, if it's an app sale or revenue generated from inapp advertising. Any difference between Apple and Android?

Thanks folks.