Use this form to transmit paper Forms 1042-S, Foreign Person's U.S. Source Income Subject to Withholding, to the Internal Revenue Service. Current revision Form 1042-T PDF Recent developments None at this time. Other items you may find useful All Form 1042-T Revisions Publication 1187, Specifications for Electronic Filing of Form 1042-S, Foreign Person's U.S. Source Income Subject to Withholding PDF Other current products Related About Form 1042-S, Foreign Person's U.S. Source Income Subject to Withholding