thomasparson - I would also like to know

johnhar - No, you can't reclaim your tax, even if you are a European Union citizen. You bought the product online, and the store is situated in the United States, and there is considered by law that you need to pay taxes for every purchase. In the USA, the situation with taxes is more complicated compared to the taxes in the EU. For example, small business and freelancers must do their accountancy and calculate taxes by themselves. Some of them are even using special services like xolo.io, which calculates taxes and accountancy for them.
___________________
https://www.xolo.io/es-es

denial - It can help you, though, to keep more accurate accounting records. Companies like https://accountingdna.com.sg/ use something similar to automate their work