Key takeaways
- Form 8879-PE covers a general partner or LLC member-manager who signs Form 1065 with a PIN.
- The firm keeps the signed form in its file rather than attaching it to the return.
- A partner who signs by hand uses Form 8453-PE, not Form 8879-PE.
- Check the Form 1065 instructions for the return's tax year, because the 2025 edition is the one currently posted on irs.gov.
What Form 8879-PE does on a Form 1065
Form 8879-PE is titled E-file Authorization for Form 1065. The IRS says a general partner or limited liability company member manager and an electronic return originator (ERO) use this form when the general partner or LLC member manager wants to use a personal identification number (PIN) to electronically sign the partnership return.
The form is the partnership's written authorization for that PIN signature. The firm needs it in the file before it transmits. The Form 1065 instructions for tax year 2025 say the return is not considered a return unless it is signed by a partner or LLC member.
The firm's role as the ERO is transmission. The signature belongs to the partner. Keep the two records separate: the signed Form 8879-PE is the signature record, and the transmission acknowledgment from your software is the filing record.
Who can sign on the form
The form describes two users: the general partner or LLC member-manager who signs, and the ERO who transmits. A limited partner, or an LLC member who is not a member-manager, falls outside that description. Check the signer's title in the partnership agreement or operating agreement before you rely on the PIN.
Decision rule: if the partner who signs is a general partner, or a member-manager of an LLC, use Form 8879-PE. If the signer is anyone else, stop and ask the client to confirm the signing partner in writing before you transmit.
Match the signer's full name and title to the Form 1065 signature block. A name that differs from the one on the authorization leaves a mismatch you will have to explain in the file.
PIN requirements and what staff must not do
The PIN is the partner's own credential. Set your procedure so the partner enters it personally, and so the firm never writes the PIN on the file copy or sends it by email.
Failure mode: a staff member enters the PIN for a busy partner over the phone. The return transmits, but the file cannot show that the partner made the entry. Fix: have the partner complete the PIN step in the software, and record the partner's name and the date on a file note.
Send the partner this request for each return: "Please sign the 2026 Form 1065 for [partnership name] through the e-file link, using your own PIN, and tell us the date you finished." The reply is the dated record you will file with the authorization.
Where the signed form goes and how long to keep it
The firm keeps the signed Form 8879-PE. The IRS description of the form I checked does not call for it to be attached to the return. Put a copy in the return file with the transmission acknowledgment, and name the file so the signer and the tax year show without opening it.
How long to keep it: the IRS pages I checked for this guide do not state a retention period for the signed form. Set the period in your file policy, and confirm it against the current IRS e-file guidance for providers before you adopt it. Keep the signed form and the transmission acknowledgment together for that whole period.
When a general partner signs by paper
If the general partner signs the return by hand instead of by PIN, Form 8879-PE is the wrong authorization for that signature. The Form 1065 instructions for tax year 2025 list Form 8453-PE, E-file Declaration for Form 1065, under electronic filing, next to Form 8879-PE.
Decision rule: if the partner wants to use a PIN, use Form 8879-PE. If the partner signs by hand, use Form 8453-PE. Do not carry both forms for the same signature on the same return. Confirm which declaration your transmitting software expects before the return goes out.
Failure mode: a general partner signs a paper signature page, and the firm transmits with an 8879-PE that the partner never completed. The file then shows a PIN signature the partner did not give. Fix: mark the unused authorization void with a dated note, and file the signed Form 8453-PE with the return record.
Tax year and revision: 2025 and 2026 returns
The Form 8879-PE on irs.gov is Rev. December 2025, and the Form 1065 instructions posted there are for tax year 2025. Those rules apply to 2025 returns filed in 2026.
A 2026 partnership return filed in 2027 uses the 2026 Form 1065 instructions and whatever Form 8879-PE revision is current when you file. Re-check irs.gov for both before the 2026 season starts, and do not carry the 2025 edition forward unchanged.
For calendar-year partnerships, the instructions give March 15 as the due date. For a calendar-year 2026 return, that is March 15, 2027. Form 7004 must be filed by that regular due date to extend the return. Confirm the 2026 dates in the 2026 instructions when they are posted.
Check before you transmit
Before you transmit a Form 1065, check five things. The signer is a general partner or LLC member-manager. The name and title match the signature block. The partner completed the PIN step personally, and the date is in your file. The signed Form 8879-PE is in the file. The tax year on the authorization matches the return.
If any item fails, hold the return. A held return costs days. A return with a signature the partner did not give costs a corrected filing and a difficult call with the client.