Hi Johannes,
I’ve just tried it on your site (added “Silta Thin” product to the cart) and it seems to be working fine: after entering Finnish VAT you’ve provided, I’ve got “VAT is valid, no VAT will be charged to EU businesses outside of Finland.” message and VAT is still there (Subtotal: 29 eur; VAT: 7 eur; Total: 36 eur). What am I missing?
P.S. Regarding your previous message – it went to spam for some reason (I suppose because site’s spam filter decided that there are too many links in the message, sorry for that).