I am a publisher from a non-US, non-EU country. In the country I live, income from royalties of websites are tax-exempt, but the company has to pay withholding tax, if it is a local company.
When I consulted my tax advisor, he asked me to find out, if Google is paying any taxes to the US when they are transferring my cheque (like a withholding tax - as I am not a resident in US, US might want to cut off the tax at the source). This way, I can show my tax office that the tax has been already paid and I do not need to pay taxes again in my country (as US and my country has an agreement to prevent double taxation).
Does anybody know about this? Does Google pay US any withholding tax for my revenue? (to compensate for the "profit-tax loss" for the US government). Any suggestions how to check it?