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IRSCredits & Incentives (8800/8900 Series)

Official form guide

Form 8879-CRP: 8879-CORP

Form 8879‑CRP (Corporate) is the IRS e‑signature authorization for a corporation’s Form 1120 series return. File it when the corporation is submitting its return electronically and needs to sign the return without attaching a paper signature.

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Form Overview

IRS Form 8879-CRP - 8879-CORP

Form 8879‑CRP (Corporate) is the IRS e‑signature authorization for a corporation’s Form 1120 series return. File it when the corporation is submitting its return electronically and needs to sign the return without attaching a paper signature.

The form captures the corporation’s name, EIN, tax year, the officer’s name, title, and a signature block confirming the return is correct.

Risk Radar

Scan points
  • 1An unsigned Form 8879‑CRP will cause the entire corporate return to be rejected.
  • 2Missing or incorrect EIN
  • 3Officer title does not match corporate records
  • 4Signature absent or illegible
  • 5Tax year entered incorrectly

Plain English

This sheet tells the IRS that the corporation’s tax return was reviewed and that an authorized officer has approved it for electronic filing. Instead of signing the whole return, the officer signs this short form, and the IRS treats it as the official signature.

Submission Date

  • Filing date: 2024-12-20 22:10:22
  • Preparation window: collect IDs, supporting records, and signatures in advance.
  • Final review: verify names, dates, and required fields before submission.

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Glossary Terms

officialpaper

Hover a term to preview the meaning.

What this form is for

  • Use when filing a corporate Form 1120, 1120‑S, or 1120‑F electronically.
  • Do not use for individual (Form 1040) or partnership (Form 1065) returns.
  • If you need a paper signature, file Form 8879‑E (paper filing) instead.

Form selector

Use this form or another form?

Paper filing of corporate return

Requires original signature on paper return

✓ Verify paper filing deadline

Form 8879‑E

Amended corporate return

Same e‑signature requirement

✓ Ensure amendment is marked clearly

Form 1120‑X with attached Form 8879‑CRP

Deadline or filing window

The form must be signed and attached before the e‑file transmission is sent. For calendar‑year returns, the IRS deadline is typically March 15 (extended to September 15 if an extension is filed). The signature must be in place by the moment the return is transmitted.

Checklist

What you need before filling it out

1

Corporation name

Articles of Incorporation or IRS records · Return header

⚠ Misspelled name✕ High
2

EIN

IRS notice or prior return · Return header

⚠ Transposed digits✕ High
3

Tax year

Return cover page · Form 1120 cover

⚠ Wrong year entered✕ Medium
4

Officer title

Corporate bylaws or resolutions · Signature block

⚠ Title mismatch✕ Medium
5

Signature

Handwritten or electronic signature image · Signature block

⚠ Missing/illegible✕ High

Before you submit

  1. 1Confirm corporation name matches IRS records.
  2. 2Verify EIN is correct on all pages.
  3. 3Check tax year matches the return being filed.
  4. 4Ensure the authorized officer’s title is valid for the corporation.
  5. 5Review the corporate return for accuracy before signing.
  6. 6Sign and date Form 8879‑CRP.
  7. 7Upload the signed form through the e‑file software.
  8. 8Confirm the software attached the signature to the return.
  9. 9Save a PDF copy of the signed form for records.
  10. 10Verify the transmission receipt from the IRS.
  11. 11Check that the filing deadline has not passed.

How to file this form

  1. 1Open the corporate return in the approved e‑file program.
  2. 2Enter corporation name, EIN, and tax year on Form 8879‑CRP.
  3. 3Have the authorized officer sign and date the form.
  4. 4Export the signed Form 8879‑CRP as a PDF.
  5. 5Attach the PDF to the electronic return within the software.
  6. 6Submit the return to the IRS.
  7. 7Download the IRS acknowledgment and store it with the signed form.

Known limitations

  1. 1The form does not contain any tax calculations; it only authorizes the return.
  2. 2Only one authorized officer may sign per filing; additional signatures are not captured.
  3. 3The IRS does not accept handwritten signatures scanned on a separate file; they must be attached to the return.
  4. 4If the corporation has multiple EINs, only the primary EIN can be used on this form.

Field map

Compact field-by-field guide

6 fields

Entity Info

1 items

Taxpayer Name and TIN

Name and taxpayer ID of the entity claiming the credit.

Requiredtext

Credit Info

1 items

Credit Type

Type of credit or incentive being claimed.

Requiredselect

Calculation

2 items

Qualifying Amount

The base amount used to calculate the credit.

Requiredamount
Credit Amount

Calculated credit amount after applying formulas and limitations.

Requiredamount

Certification

1 items

Supporting Information

Detailed breakdown supporting the credit calculation.

text

Signatures

1 items

Signature

Sign and date the form.

Requiredsignature
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Current form status
IRS

The form is currently in the 2024 edition, effective for tax years beginning after Jan 1 2024. No major revisions have been issued since the last update.

What changed or needs a fresh check

  • Edition date: 2024
  • Fee: none (signature authorization only)
  • Mailing address: not applicable for electronic submission
  • Software provider: must support IRS e‑file signature attachment
  • Retention period: keep for at least 3 years
  • Signature format: electronic or scanned handwritten

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Form 8879-CRP page 1

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Quick Facts

A corporate officer (president, treasurer, CFO, or other authorized officer) signs on behalf of the corporation.
The form captures the corporation’s name, EIN, tax year, the officer’s name, title, and a signature block confirming the return is correct.
It is completed after the corporate return is finished and before the e‑file transmission is sent to the IRS, typically on the same day as the electronic filing.
Submit the signed Form 8879‑CRP to the IRS electronically through the authorized e‑file software provider; a paper copy is kept for the corporation’s records.
An unsigned or incorrectly completed Form 8879‑CRP can cause the IRS to reject the electronic return, delaying processing and possibly incurring penalties.
1. Fill out the corporation’s identifying information and tax year. 2. Review the completed corporate return for accuracy. 3. The authorized officer signs and dates the form. 4. Upload the PDF through the e‑file software, which attaches the signature to the return. 5. Retain the signed form for at least three years.

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After you file

  1. 1Save the IRS acknowledgment receipt.
  2. 2File the signed Form 8879‑CRP with the corporate tax record.
  3. 3Update the corporate compliance calendar with the filing date.
  4. 4Monitor the IRS portal for any rejection notices.
  5. 5If rejected, correct the issue and re‑sign a new Form 8879‑CRP.
  6. 6Retain all related documents for at least three years.
  7. 7Notify the finance team that the return is filed.

Sources

  • SRCIRS Form 8879‑CRP instructionsconfirms purpose and signing officer requirement.
  • SRCIRS Publication 17mentions electronic signature authorization.
  • SRCIRS e‑file guidelinesdescribe attachment of Form 8879‑CRP to corporate returns.
  • SRCIRS deadline calendarcorporate return due March 15 (or extended).
  • SRCNot found in provided source: specific software provider requirements.

Common confusion points

Form 8879‑CRP vs. 8879‑E

One is for electronic, the other for paper

→ Verify filing method first

Officer title requirement

Some corporations accept “President” only

→ Check corporate bylaws

Signature format

Scanned signatures sometimes fail

→ Use software‑generated e‑signature if available

Multiple tax years on one return

Rare but possible

→ Ensure tax year matches the return

Retention period

Not always obvious

→ Keep for 3 years per IRS record‑keeping rules

Workflow map

Related forms and next steps

4 signals

Before

Form 1120 (or 1120‑S, 1120‑F)

Current

8879-CRP

After

IRS acknowledgment (Form 1040‑X for amendments)

Often used with

IRS e‑file software that supports Form 8879‑CRP

⚠ If something goes wrong

  • Form 8879‑E for paper filing

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Source transparency

Copyright & Licensing - US Government Forms

Independent guide

BrieflyGo links to and explains official public form sources. We are not a government agency, and this page is for general form guidance, not legal advice.

Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
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