Form 1042-T summarizes and transmits paper Forms 1042-S to the IRS. The IRS explicitly says not to use it when filing Forms 1042-S electronically. First establish whether paper filing is permitted, then prepare a separate transmittal for each required type of paper batch.
The official Form 1042-T page links to the current final form and prior revisions. Use the version for the reporting year and review the Form 1042-S electronic-filing requirements before assembling a paper package.
Keep the three form roles separate
| Form | Role |
|---|---|
| 1042-S | Reports the relevant income, withholding and recipient information. |
| 1042-T | Transmits a specified type of paper Forms 1042-S to the IRS. |
| 1042 | The annual withholding tax return, with its own filing obligations. |
The 1042-T instructions state that using the transmittal does not affect the obligation to file Form 1042. Do not treat a paper cover sheet as the annual tax return or as a substitute for recipient statements.
Electronic 1042-S filing has its own format and transmission requirements. A spreadsheet export, a recipient PDF and a paper 1042-T package are different artifacts. Confirm the intended filing method before selecting a preparation workflow.
Confirm that paper filing is available to the filer
Review the applicable year’s 1042-S instructions, including the aggregation rules for electronic filing and any requirements based on the type of filer. A small count of Forms 1042-S by itself does not establish permission to file on paper.
Document the reviewed filing-method decision and any applicable approved waiver. Do not create a paper package merely because a current electronic process is unavailable or a deadline is close. The practical paper-eligibility guide below provides a worksheet for the decision and supporting evidence.
The current final 1042-T linked by the IRS is for tax year 2025; the current 1042-S instruction page covers 2026. Keep these editions explicit in planning records and obtain the correct final form for the year being filed.
Separate the required types of paper Forms 1042-S
The 2025 transmittal instructions require a separate Form 1042-T for each type of paper Form 1042-S. Distinctions include chapter 3 versus chapter 4, original versus amended, pro rata status and the specified partnership reporting category. Review the complete line 1 instructions, including any applicable line 1f treatment.
Chapter 3 and chapter 4 forms cannot share one transmittal. Original and amended forms also require the appropriate separate grouping. Keep a batch manifest that records the reviewed attributes and lists the attached forms.
Fictional example: A paper-eligible filer has six chapter 3 original, non-pro-rata statements and two chapter 3 amended, non-pro-rata statements. With no other distinguishing category involved, the original and amended sets require separate transmittals. One combined count of eight would conceal the required separation.
Reconcile each transmittal to its own attachments
For the 2025 form, line 1d counts the attached paper Forms 1042-S. Line 2 totals their box 2 gross income amounts. Line 3 totals the amounts reported in boxes 10 and 11 of those attached forms, using either the chapter 4 line 3a or the chapter 3 line 3b as instructed.
Use only the records in that batch. A company-wide annual total can be correct overall and still be wrong for a particular transmittal. Recalculate from the final attachments after any record is moved, replaced or amended.
Retain the manifest, current statement versions, calculation and review notes. The withholding agent’s identifying information and chapter status codes must agree with the related forms as instructed. Resolve differences at the source rather than changing a cover-sheet total without explanation.
Review timing, signature and mailing evidence
For 2026 Forms 1042-S, the regular filing and recipient-furnishing deadline is March 15, 2027, as stated in the 2026 instructions. A permitted paper packet includes Form 1042-T and follows that filing deadline. Check special partnership timing and any authorized extension separately. Obtain the correct final 1042-T edition and verify its address and mailing instructions before sending the packet.
Have the appropriate person review and sign the transmittal. Preserve a copy of the signed form, the final attachment manifest and mailing evidence. A prepared package and a mailed package should have different statuses in the tracking register.
If an amended 1042-S changes gross income or withholding already reported on Form 1042, review the corresponding amended-1042 requirement in the official instructions. Track recipient copies and agency submissions separately so completing one obligation does not hide an unfinished one.
Common questions
Do I e-file Form 1042-T?
No. The form’s instructions say not to use it when submitting Forms 1042-S electronically. It is the transmittal for an eligible paper submission.
Does every withholding agent need a 1042-T?
No. Its role depends on submitting paper Forms 1042-S. Determine the filing method and applicable requirements first.
Can one transmittal cover all my paper statements?
Only if they belong to the same required type under the form instructions. Review chapter, original/amended and other applicable distinctions before grouping.
Does filing 1042-T replace Form 1042?
No. The annual withholding tax return has a separate obligation. Review any effect of amended statements on a return already filed.
Sources: IRS Form 1042-T overview, 2025 Form 1042-T and instructions, and 2026 Form 1042-S instructions.
