I'm currently a registered business within the EU and I comply with certain tax regulations. For those of you who are aware of the MOSS system, it can be quite a pain to comply.
Anyways... I've found a payment tracker which does it all for you. I need XenForo integration for it. https://quaderno.io/docs/
If you're accepting money and you're a registered business in EU, you need to comply with VAT regulations anyways. I think this system is ideal.