Shopify and VAT handling is unfortunately not a very good match. After the implementation of OSS (One Stop Shop) from July 1st, you can only choose to:
- Either have your VAT correctly calculated within the EU (same price to different countries, regardless of the respective countries VAT rate).
- Or have the VAT correctly deducted from customers outside the EU.
Shopify unfortunately messed this up properly with this new VAT handling, and I've been trying ever since to get them to realise this and fix it. I must say though, don't expect this to be solved anytime soon. Just making it possible to sell to non EU customer without VAT was something Shopify ignored for rover 7 years before fixing.
I would suggest what we are doing, check if another store platform is better with VAT handling and better fits your needs. Shopify are doing a lot of things very well, but this is a MAJOR flaw which is costing tons of money in lost revenue, and Shopify are in our experience (+5 years as merchants) not taking any feedback from their customers seriously.