IRS POA Fax Number: Complete Guide to Faxing Form 2848

By Michael Chen · Published March 12, 2026 · Updated April 10, 2026 · 8 min read

The IRS POA fax number is the direct line to the IRS Centralized Authorization File (CAF) unit — the office that processes your Power of Attorney (Form 2848). The correct number depends on which state you're filing from. Sending to the wrong unit is the single most common cause of unnecessary delays.

Short answer: Eastern states fax to 855-214-7519 (Memphis CAF). Western states fax to 855-214-7522 (Ogden CAF). International filers use 855-772-3156.

Read on for the full state-by-state breakdown, a step-by-step faxing guide, and the 2026 alternatives that are significantly faster than traditional fax.

What Is an IRS POA?

An IRS Power of Attorney (POA) is the formal authorization that allows a tax professional — an attorney, CPA, or enrolled agent — to represent you before the IRS. Without it, the IRS will not speak with your representative about your tax matters, no matter how clear the arrangement is between you privately.

The governing form is Form 2848 (Power of Attorney and Declaration of Representative). It covers:

• Representation in IRS audits, appeals, and collections
• Signing agreements, waivers, and consents on your behalf
• Receiving and inspecting confidential tax information
• Executing closing agreements with the IRS

Form 2848 vs. Form 8821: These are frequently confused. Form 8821 (Tax Information Authorization) only grants inspection rights — your designee can receive your tax info but cannot represent you or take any action. If your tax professional needs to actually do things with the IRS on your behalf, Form 2848 is what you need.

IRS POA Fax Numbers by Location (2026)

The IRS routes Form 2848 submissions through three regional CAF units. Use the table below to find the correct fax number based on the taxpayer's state of residence — not the representative's location.

Mailing Addresses (If You Choose to Mail Instead)

For a full list of IRS fax numbers across all major forms, see our master guide to IRS fax numbers.

What Your IRS POA Covers

Form 2848 gives your representative defined powers. Understanding the scope helps you fill out Section 3 (Description of Matters) correctly — a common source of rejections.

Your representative CAN:

• Receive and inspect any confidential tax information for the specified periods
• Represent you in IRS interviews, audits, and correspondence
• Sign agreements, consents, and waivers (unless you restrict this in Section 5a)
• Request copies of tax returns and transcripts
• Sign tax returns only if you are unable to do so (disability, unavailability)

Your representative CANNOT (without additional authorization):

• Substitute another representative in their place
• Add additional representatives
• Disclose your tax information to a third party

Section 3 must be specific. This is the most-rejected section. You must list:

• The type of tax (e.g., "Income", "Employment", "Estate")
• The specific form number (e.g., "Form 1040", "Form 941")
• The exact tax years or periods (e.g., "2023, 2024, 2025")

Writing "All taxes" or "All years" will get your form rejected automatically.

How to Fax Your IRS POA: 5 Steps

6 Reasons the IRS Rejects IRS POA Submissions

Most rejections are preventable. These are the mistakes I see most often:

1. Missing representative signature (Part II) — The taxpayer signs, the tax pro forgets. Both signatures are required, no exceptions.

2. Vague Section 3 language — "All years," "All tax matters," or "All periods" triggers automatic rejection. Be specific: "Income tax, Form 1040, tax years 2023 and 2024."

3. Wrong CAF unit fax number — Sending an Eastern-state form to the Ogden number means the IRS has to manually reroute it, adding days to the timeline. Use the table above.

4. Electronic signatures on faxed forms — Digital signatures are accepted on the online portal (Submit2848), not on faxed forms. Wet ink is the safe choice for faxed submissions.

5. Illegible handwriting — If the IRS can't read the SSN or EIN, they can't match it to a taxpayer account. Type the form data whenever possible; only the signature should be handwritten.

6. Duplicate submissions — If you already faxed the form, don't also mail it or submit it online. The IRS processes the first one received and typically discards duplicates, which can create conflicting records.

Fax vs. Online vs. Mail: Which Is Fastest in 2026?

Not every situation calls for a fax. Here's how the submission methods compare:

The Tax Pro Account (IRS.gov/Tax-Pro-Account) is the fastest option available in 2026 — authorizations are recorded on the CAF system in real time. It currently supports individual taxpayers only (not entities or businesses).

The Submit2848 portal (IRS.gov/Submit2848) accepts electronic signatures and processes in 4–10 business days. It requires an ID.me account for authentication.

Faxing is still the right choice when you need to submit immediately without setting up a digital account, or when handling entity/business POAs that aren't yet supported online.

What Happens After You Fax Your IRS POA

Once the IRS receives your faxed Form 2848, here's what happens:

1. CAF Unit receives and logs it. The regional CAF unit (Memphis, Ogden, or Philadelphia) receives your fax and adds it to the processing queue. Faxes are processed in the order received.

2. The form is reviewed for completeness. Clerks check for missing signatures, vague Section 3 language, and matching taxpayer SSN/EIN. Incomplete forms are rejected without notification — you won't automatically hear that something went wrong.

3. Authorization is entered in the CAF system. Once approved, your representative's authorization is recorded in the Centralized Authorization File. From this point, they can call the IRS, request transcripts, and act on your behalf.

4. CAF number assigned (first-time reps). If your representative doesn't yet have a CAF number, one is assigned during processing. Include this number on all future Form 2848 submissions to speed things up.

5. No confirmation is sent. The IRS does not notify you when processing is complete. Your representative can verify their authorization status by calling the IRS Practitioner Priority Service at 866-860-4259.

Fax Your IRS POA From Your Phone

You don't need to find a physical fax machine at a library or office store. mFax.to lets you send your Form 2848 to the IRS from your iPhone or Android in under two minutes:

1. Open the mFax app or visit mFax.to
2. Upload your signed Form 2848 PDF
3. Enter the correct CAF unit fax number (from the table above)
4. Send — and receive a timestamped delivery confirmation

Over 5 million people use mFax for exactly these kinds of important, time-sensitive documents. The digital receipt you receive protects you if the IRS later questions receipt of your submission.

For details on faxing specifically from a mobile device, see our guides on how to fax from iPhone and how to fax from your computer.

Summary: IRS POA Fax Numbers at a Glance

Got the form ready? Try mFax.to to send it to the IRS in minutes — no fax machine needed.

For a deeper walkthrough of completing Form 2848 itself, see our full guide: How to Fax IRS Form 2848.