Hello, I’m form Bosnia and Herzegovina and I earn really low money from my sales bcs of many of taxes. So can I do anything to earn more money from my sale?
Increase the price. Move to a different country. Sell more content so you royalty rate increases. Those are the only available options unfortunately. Although if your country has a double taxation treaty with the US, you should be able to offset the amount of tax withheld against the amount of tax you have to pay in your own country.