Why can't the solo stove site open "Open Zonos Hello" on Firefox when it works on Safari? Zonos is a tax calculator for international trade provided by solo stove exemple : Come here for information throughout the shopping experience to learn more about what to expect when bringing goods into Switzerland. Duties and Taxes In Switzerland customs duties and tax amounts under 5 CHF are not levied. VAT is 7.7%. As you add items to your cart, you can return here to get more detailed calculations on possible duty and VAT.