From our experience, there are three possible causes as to why taxes are missing on your orders and invoices:
Please, check more details in our article regarding missing tax on Shopify orders and invoices. I hope it helps!
- Lenka from Sufio
Thanks for getting in touch with your question and I'd be happy to look into this for you. As @Sufio mentioned, there may be some incorrectly configured settings which are leading to appropriate taxes being charged at checkout.
Could you please also tell me which country you're based in? If it's the USA, can you tell me which state you are based in?
Victor | Shopify Social Care