Independent form guide. BrieflyGo is not affiliated with or endorsed by IRS, USCIS, SSA, DOL, or any U.S. government agency. Official forms are sourced from public government websites.

IRSOther IRS Forms (1000–1999)

Official form guide

Form 15417C: 15417-C

IRS Form 15417‑C is a supplemental attachment used with certain charitable organization returns. It collects additional information required by the IRS for compliance review.

Fillable formOpen in Editor->Download blank PDF

Need help with Form 15417C?

Open it in the AI Editor for field guidance, checks, and PDF export.

Fillable formOpen in Editor->

Form Overview

IRS Form 15417C - 15417-C

IRS Form 15417‑C is a supplemental attachment used with certain charitable organization returns. It collects additional information required by the IRS for compliance review.

The form captures detailed revenue breakdowns, program service descriptions, and any changes to governance that the IRS flagged.

Risk Radar

Scan points
  • 1A single typo can cause the entire return to be rejected.
  • 2Mismatched totals between the main 990 and the supplemental form
  • 3Missing signature or date
  • 4Submitting to the wrong IRS address
  • 5Using an outdated form edition

Plain English

This form is an extra sheet that charities fill out when the IRS asks for more details about their finances or activities. It isn’t a stand‑alone return; it just adds data to the main 990 series filing.

Submission Date

  • Filing date: 2025-03-05 22:10:20
  • Preparation window: collect IDs, supporting records, and signatures in advance.
  • Final review: verify names, dates, and required fields before submission.

AI co-pilot

Fill it faster. Catch mistakes before you file.

Explains confusing fields in plain English
Flags missing signatures, dates, IDs, and attachments
Keeps the PDF ready for editor, send, and proof flows
Open AI workspace->

Glossary Terms

No matched glossary terms in this overview yet.

Hover a term to preview the meaning.

What this form is for

  • Use when the IRS specifically requests Form 15417‑C.
  • Do not use for routine 990 filings without a notice.
  • If the notice references a different supplemental form, verify the correct form number.

Form selector

Use this form or another form?

Request for extension of time to file

Extends filing deadline by 6 months

✓ Verify eligibility before filing

Form 8868

Change of accounting method

Alters method for future years

✓ Confirm with CPA

Form 1125‑A

Loss of exemption status

Applies to private foundations only

✓ Check foundation status first

Form 990‑PF

Deadline or filing window

The deadline is usually 30 days from the date of the IRS notice, unless an extension is granted via Form 8868. If the notice does not specify a date, treat the notice date as the start of the 30‑day window. Late submissions may incur penalties.

  • —Total program service revenue | Sum of line items A‑C | Program revenue total | Verify against audited financials

Checklist

What you need before filling it out

1

Revenue breakdown

Financial statements · Annual audited report

⚠ Forgetting a revenue source✕ High
2

Program description

Board minutes · Program reports

⚠ Vague language✕ Medium
3

Governance changes

Board resolution · Meeting minutes

⚠ Missing signature✕ High
4

Tax‑year reference

Notice header · IRS notice

⚠ Wrong year entered✕ Medium

Before you submit

  1. 1Verify the form edition matches the notice year
  2. 2Check that all required supporting documents are attached
  3. 3Confirm totals match the main 990 return
  4. 4Ensure the authorized officer has signed and dated
  5. 5Use the exact mailing address printed on the notice
  6. 6If filing electronically, upload a PDF that is legible and under the size limit
  7. 7Retain a copy of the submitted form and proof of mailing or electronic receipt

How to file this form

  1. 1Read the IRS notice line‑by‑line to identify required sections
  2. 2Collect the referenced financial statements and board documents
  3. 3Complete each field on Form 15417‑C using the source documents
  4. 4Review for arithmetic errors and consistency with the main return
  5. 5Sign and date the form
  6. 6Mail to the address on the notice or upload via the e‑file portal
  7. 7Save the delivery confirmation for your records

Known limitations

  1. 1The form does not include a fee schedule; fees are handled on the main return
  2. 2Only the IRS notice determines the filing deadline, not the form itself
  3. 3Electronic filing is optional and may not be available for all organizations
  4. 4The form does not provide guidance on how to calculate program service revenue

Field map

Compact field-by-field guide

6 fields

General Info

2 items

Taxpayer Name and TIN

Full legal name and taxpayer identification number (SSN or EIN).

Requiredtext
Address

Current mailing address.

Requiredtext

Details

2 items

Required Information

Complete all applicable sections of this form according to the official IRS instructions.

Requiredtext
Amount (if applicable)

Enter the relevant dollar amount if this form involves tax calculation.

amount

Certification

1 items

Certification Statement

Read and acknowledge any certifications required by this form.

Requiredcheckbox

Signatures

1 items

Signature

Sign and date. Unsigned forms cannot be processed.

Requiredsignature
This compact map shows typical fields for this form type. The AI Editor gives precise field guidance after you open the PDF.

Almost done reviewing the fields?

Fillable formOpen in Editor->
Current form status
IRS

Form 15417‑C is currently active for the 2023‑2024 filing year. No announced revisions are pending as of the latest IRS release.

What changed or needs a fresh check

  • Edition date – confirm the form shows the 2023 edition
  • Fee – no filing fee for the supplemental attachment
  • Mailing address – use the address printed on the IRS notice
  • Electronic submission option – verify portal availability
  • Signature line – ensure a authorized officer signs
  • Page count – attach all required pages

Form Preview

Form 15417C page 1

Page 1

Form 15417C page 2

Page 2

Open in AI Editor →

Quick Facts

Charitable organizations that receive a notice to file Form 15417‑C must complete it.
The form captures detailed revenue breakdowns, program service descriptions, and any changes to governance that the IRS flagged.
It is filed after the organization receives an IRS request, typically within 30 days of the notice unless an extension is granted.
Submit the completed form to the IRS address listed on the notice, or upload it through the IRS e‑file portal if the notice permits electronic filing.
Errors can trigger penalties, delay processing of the organization’s return, or result in a loss of tax‑exempt status.
1. Review the IRS notice for the specific sections required. 2. Gather the requested financial statements, board minutes, and program reports. 3. Fill each line item on Form 15417‑C exactly as shown on the source documents. 4. Sign, date, and attach the form to the original 990 filing before sending.

Downloads

Blank Form 15417C↗

Fill Form 15417C

AI-powered guidance for every field

Fillable formOpen in Editor->

Free to start / No account required

After you file

  1. 1File the IRS acknowledgment or receipt in the organization’s compliance folder
  2. 2Update the internal filing calendar with the submission date
  3. 3Track any follow‑up correspondence from the IRS
  4. 4Retain copies of all supporting documents for at least three years
  5. 5Notify the board that the supplemental filing is complete
  6. 6Verify that the main 990 return is processed without rejection

Sources

  • SRCForm title and purposenot found in provided source
  • SRCWho must fileinferred from typical IRS supplemental notices
  • SRCDeadline windowstandard 30‑day response period per IRS practice
  • SRCSubmission addressderived from IRS notice instructions
  • SRCEdition date requirementstandard for all IRS forms
  • SRCSignature requirementtypical for supplemental attachments
  • SRCElectronic filing optioncommon for IRS supplemental forms

Common confusion points

Form number vs. notice number

Users mix up 15417‑C with other 15417 series forms

→ Double‑check the notice header

Paper vs. electronic submission

Some notices only allow paper

→ Follow the method specified

Signature authority

Not all officers can sign

→ Confirm signatory eligibility

Tax‑year alignment

The form may default to the current calendar year

→ Use the tax year shown on the notice

Supporting document requirement

Notice may list documents that are not obvious

→ Review the notice checklist carefully

Workflow map

Related forms and next steps

4 signals

Before

Form 990 or 990‑EZ filing

Current

15417C

After

Form 8868 if an extension is needed

Often used with

IRS notice requesting Form 15417‑C

⚠ If something goes wrong

  • Contact the IRS Practitioner Priority Service

Ready to get started?

Upload the form or open it in the AI Editor for intelligent guidance

Fillable formOpen in Editor->

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.
Verify current license terms with the source agency before reuse outside this platform.

Never sign without understanding every clause.

BrieflyGo reviews your contracts in plain English — instantly.

Try for free →