Hi @DeliaDao ,
This is strange for sure. Without taking a closer look at the tax settings of your store it’s very difficult to figure out why this might be happening. This is something which you would need to reach out to our support team about who can assign it to the right team to look into. We’re not able to provide account-specific support via the Shopify Community at this time, we’d be happy to continue assisting you through live chat, email, or callback. Please visit our support team here and log in to your account to create a support request. Once you are talking to a support advisor and verified your account they can assist you with this.
It could also be worth double-checking and going over your tax settings as per the help guides here too to make sure everything is correct!