u must read what is allowed in your country if u trade with other countries, may u get infos at a public office in your city.
for most countries google pay the tax to the countries, but not at all.
minimum u must give google your address data and for usa u must fill out a online document.
some countries allow a "free" amount of money transfer without tax if u not have a business/company.
if "u" pay the taxes direct or indirect everything should be fine.
u can also exclude a country in app settings.
AGK (Steam) V2.0.20 : Windows 10 Pro 64 Bit : AMD (16.3.2) Radeon R7 265 : Mac mini OS X 10.10 (Yosemite)