For non-US payees, tax withholdings are determined by whether or not the US has a tax treaty with your country and whether or not you have applied for that treaty when submitting your tax form. This will default to 30% unless a treaty is applicable. You will find this option in a drop-down menu when completing your tax forms. For US payees, no taxes are withheld.
Audiam requires valid tax information for all accounts in order to process payments.