In my country(Georgia) we don’t pay tax and we don’t have a tax-id number
how I filled the tax-id box?
For reducing US backup withholding tax (24%) you should to submit your TAX information form. If you submit the form with your TAX information then only tax will be taken for US sale and TAX percentage depends on your country.
US Tax Treaties:
Otherwise you have to give US backup withholding tax (24%) for all of your sale.
But for getting that tax facility you have to provide TAX information through settings=>tax information. When you complete your tax information, you must also provide Tax Identity Number, otherwise, Envato are required to deduct royalty withholding tax of 30% on your sales to US customers.
Are you sure about that?! The internet seems to think otherwise!