When Is Form 1042 Due - Web when are the forms due? If additional time is required to file the form,. Information about form 1042, annual withholding tax return for u.s. Source income of foreign persons, including. Web page last reviewed or updated:
Source income of foreign persons, including. If additional time is required to file the form,. Web page last reviewed or updated: Web when are the forms due? Information about form 1042, annual withholding tax return for u.s.