Normally to benefit from tax havens/reliefs you need to live outside of your home country. Panama is worth looking into as from my understanding you only pay tax to the Panama goverment on moneies earned within Panama and not from outside earnings.
Several affiliates are based within Costa Rica/Caymans/Bahama’s and benefit from reduced to zero tax.
If you live in the US no matter where you are based you will need to pay tax to uncle sam.
Take a look trustprofessionals.com