Form 1042-S is used to report amounts paid to foreign persons (including persons presumed to be foreign) that are subject to tax withholding, even if no amount is deducted and withheld from the payment because of a treaty or code exception to taxation or if any amount withheld was repaid to the payee. It is also used to report amounts withheld under Chapter 3 of the Internal Revenue Code.
If you determine that you need to file a Form 1040 resident tax return rather than Form 1040NR, you can enter this data in to TaxAct, although Form 1042-S is not available in the 1040 program.
If Form 1042-S lists federal tax withheld in box 7 or state tax withheld in box 21, you can enter this data on a Form 1099-MISC in the program. You must paper file your return in this instance, including Form 1042-S with your tax return.
For more information, see the IRS Instructions for Form 1042-S and Form 1042-S.