there are two types as taxes
VAT : amazon collect them and give them back to the country where the buy is done. they are just a relay, you are paying this tax, not amazon
corporate taxes on profit : they pay them but in their best interest using law loopholes and international paradise islands. in the end they pay almost nothing with respect to their activity. all big companies do that, including digital companies love on that board.
trump is an hypocrit, he used the system as well. it does not change that the system has to be changed on a worlwide level, otherwise citizen will be the only one funding countries expanses. probably will not happen. too much corruption.