IRS Form 2848 Instructions: Line-by-Line Guide and Filing

To fill out IRS Form 2848 correctly, work down the form line by line: identify yourself on Line 1, name up to four eligible representatives on Line 2, describe the exact tax matters and years on Line 3, use Line 4 for one-off matters that shouldn’t be recorded centrally, expand or restrict your representative’s authority on Lines 5a and 5b, decide on Line 6 whether prior authorizations survive, and finish with signatures on Line 7 and Part II. The form is tightly structured so the IRS knows exactly who has authority, over which tax matters, and for which years.¹ Any missing detail can delay processing or trigger outright rejection, so accuracy on every line matters.

Line 1: Your Information as the Taxpayer

Line 1 identifies the person or entity granting the power of attorney. Enter your full legal name, current mailing address, daytime telephone number, and taxpayer identification number. Individuals use their Social Security Number or Individual Taxpayer Identification Number. Businesses enter their Employer Identification Number.² If the matter involves an employee benefit plan, include the plan number as well.

Joint filers trip on this line often. If you and your spouse filed jointly and both need representation, each spouse must file a separate Form 2848, even when appointing the same representative.³ A single form listing both names will be rejected.

Line 2: Naming Your Representative

Line 2 identifies up to four individuals authorized to represent you. For each representative, enter their full name, mailing address, telephone number, and fax number, along with three identifiers.

The first is the Centralized Authorization File (CAF) number, a unique nine-digit number the IRS assigns the first time a person files a third-party authorization.⁴ If the representative has never been assigned one, write “None” and the IRS will issue one when it processes the form. The second is the representative’s Preparer Tax Identification Number (PTIN), required for anyone who prepares federal returns for compensation.⁵ If the representative doesn’t prepare returns, leave that field blank. The third is a checkbox for whether the representative should receive copies of IRS notices and communications. Check it for any representative you want to stay in the loop.

Who Can Serve as Your Representative

Not everyone qualifies. Attorneys, certified public accountants, enrolled agents, enrolled retirement plan agents, and enrolled actuaries have unlimited practice rights and can represent any taxpayer on any matter.⁶

Several other categories have limited rights. A family member (spouse, parent, child, sibling, step-relatives, or grandparents) can represent you in limited situations. A full-time employee can represent their employer. A bona fide corporate officer can represent the corporation, and a general partner can represent the partnership.⁶ Unenrolled return preparers who prepared and signed the return in question have limited rights extending only to those returns and only before revenue agents and examination officers. Students in qualified Low Income Taxpayer Clinics can represent taxpayers under special authorization from the Taxpayer Advocate Service.¹

Line 3: The Tax Matters, Forms, and Years

Line 3 is the heart of Form 2848. It specifies exactly which tax matters your representative can handle, and it has three columns. All three must be filled in correctly or the IRS will return the form.

Description of matter. Enter the official tax category, such as “Income,” “Employment,” “Estate,” “Gift,” or “Excise.” Vague descriptions like “all taxes” or “personal taxes” get the form rejected.

Tax form number. Enter the specific form number tied to that tax type. Individual income tax uses Form 1040, corporate income tax uses Form 1120, quarterly employment tax uses Form 941, and excise tax uses Form 720. If no form number applies (a penalty matter or a ruling request, for example), enter “Not Applicable.”

Year(s) or period(s). List the specific tax years or periods covered. For annual returns, enter the year, such as “2025.” For quarterly returns, identify the quarter and year, such as “3rd 2025.” You can list a range using “thru” or a hyphen, like “2023 thru 2025.” For estate tax, enter the decedent’s date of death instead of a year.

You can list current, past, and future years. But the IRS won’t record future periods on the CAF that extend more than three years past December 31 of the year the form is received. If the IRS receives your form in 2026, you can list periods through December 31, 2029; listing “2032” on a form received in 2026 means that year won’t be recorded. General references like “All years,” “All periods,” or “All taxes” are not accepted, and the IRS will return the entire form.³

Your representative’s authority is strictly limited to the matters and periods listed here. If they contact the IRS about a year or form that isn’t on the line, the IRS won’t discuss it. That’s by design, and it gives you control over exactly which issues your representative can address.

Line 4: Specific-Use Authorizations

Most powers of attorney are recorded on the Centralized Authorization File, a system that lets IRS employees quickly verify representative authority. Some authorizations are one-off and don’t belong there. Check the box on Line 4 if your power of attorney covers a specific matter that shouldn’t be recorded on the CAF, such as a private letter ruling request or a Freedom of Information Act inquiry.³ When this box is checked, your representative should send the form directly to the IRS office handling the matter, not to the centralized processing unit.

Lines 5a and 5b: Expanding or Restricting Authority

Line 5a: Additional Acts Authorized

By default, Form 2848 covers routine acts: receiving information, attending meetings, signing agreements, and corresponding with the IRS. Line 5a lets you add more by checking the applicable boxes.³

Access IRS records via an Intermediate Service Provider. Without this box checked, your representative can only pull transcripts directly from IRS systems. Checking it allows them to use third-party services that interface with the IRS.

Authorize disclosure to third parties. Your representative cannot consent to the IRS sharing your tax information with outside parties unless you specifically grant this authority.

Substitute or add representatives. Checking this box lets your representative appoint another representative on your behalf. Only check it if you fully trust their judgment in choosing a substitute.

Sign a return. A representative can sign your tax return only in narrow circumstances: you are unable to sign due to disease or injury, you have been continuously outside the United States for at least 60 days before the filing deadline, or the IRS has granted specific permission for other good cause. Checking the box alone does not convey this authority; the underlying circumstance must exist.³

Other. An open field for additional acts you want to authorize, in your own words.

Line 5b: Specific Acts Not Authorized

Line 5b works in the opposite direction. The form already includes one built-in restriction: your representative is not authorized to endorse or negotiate any government check issued for a federal tax liability. That restriction is printed on the form and applies unless you affirmatively override it.⁷ You can add further restrictions by writing them in—for example, excluding your representative from agreeing to extend the statute of limitations on assessment or from entering into a closing agreement.

Line 6: Prior Powers of Attorney

Filing a new Form 2848 normally revokes any earlier power of attorney on the CAF for the same tax matters and periods. If you want the earlier authorization to stay in effect alongside the new one, check the box on Line 6 and attach a copy of the prior power of attorney.⁸ If you don’t check the box and don’t attach the earlier form, the IRS replaces the old authorization. Filing Form 2848 does not revoke any Form 8821 (Tax Information Authorization) on file.

Line 7 and Part II: Signatures

The form requires two signatures: yours as the taxpayer on Line 7 in Part I, and your representative’s in Part II, the Declaration of Representative.

Taxpayer Signature (Line 7)

An individual taxpayer signs and dates the form personally. Entity signatures follow the entity type:⁷

Corporation: an authorized officer such as the president or CFO signs and includes their title.
Partnership: any authorized partner signs.
Trust or estate: the trustee or executor signs.

A missing title for a business signer is one of the most frequent reasons for rejection. Always include the title next to the signature when signing on behalf of an entity.

Representative Signature (Part II)

Each representative listed on Line 2 must sign Part II. When signing, the representative enters their designation letter (such as “a” for attorney, “b” for CPA, “c” for enrolled agent), their licensing jurisdiction or state, and their bar, license, or enrollment number.⁷ Omitting the designation letter or enrollment number is another common rejection trigger.

The 45-Day Signing Window

Timing matters. The taxpayer typically signs first, and the representative must sign within 45 days of the taxpayer’s signature date. If the taxpayer lives outside the United States, the window extends to 60 days.³ If the representative misses the window, the IRS rejects the form. This catches people off guard when forms get passed back and forth by mail.

How to File the Completed Form

You have three submission methods, and the method you choose affects both how you sign and how fast the authorization gets processed.

Online

The IRS accepts Form 2848 through two online channels. The Submit Forms 2848 and 8821 Online tool lets tax professionals upload a completed form after creating an account. Electronic signatures are accepted for online submissions, including typed names, scanned images of handwritten signatures, and signatures created with stylus devices or third-party software. Tax Pro Account offers real-time processing for individual powers of attorney and tax information authorizations, and it lets practitioners view and withdraw active authorizations online.⁹

Fax or Mail

You can fax or mail the form using the addresses and fax numbers in the form’s Where To File Chart, organized by the taxpayer’s state of residence. For fax and mail submissions, all signatures must be wet ink. The IRS does not accept electronic signatures on faxed or mailed forms.⁹ Submitting an electronically signed form by fax is a common rejection mistake.

The IRS processes forms in the order received regardless of method, but Tax Pro Account typically clears authorizations fastest because it records them in real time. Faxed forms generally take longer, and mailed forms take the longest. If you need to discuss a case before the authorization is recorded, you can fax a wet-ink-signed copy directly to the IRS employee handling the matter, or call the Practitioner Priority Service line.⁹

Mistakes That Cause Rejection

The CAF unit rejects Form 2848 for avoidable clerical errors more often than most people realize. The most common:

Only one signature on the form. Both taxpayer and representative must sign.
More than 45 days between the taxpayer’s signature and the representative’s signature (60 days for taxpayers abroad).³
An electronic signature on a form sent by fax or mail. Electronic signatures work only through the online submission tools.⁹
Vague Line 3 entries like “All years” or “All taxes” instead of specific tax types, form numbers, and periods.³
Future periods listed beyond the three-year limit past December 31 of the year the IRS receives the form.
A missing designation letter or bar, license, or enrollment number in Part II.
A missing title next to a business signer’s signature on Line 7.
Line 6 checked without a copy of the prior Form 2848 attached.¹⁰

When the IRS rejects a form, it sends the form back with an explanation of the deficiency. Fix that specific issue and resubmit. If you need representation while the corrected form works through processing, fax the corrected copy directly to the IRS employee handling the case or contact the Practitioner Priority Service.

1
Internal Revenue Service. About Form 2848, Power of Attorney and Declaration of Representative
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Internal Revenue Service. Taxpayer Identification Numbers
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Internal Revenue Service. Instructions for Form 2848
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Internal Revenue Service. What is a CAF number
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Internal Revenue Service. PTIN Requirements for Tax Return Preparers
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Internal Revenue Service. IRM 1.25.1 Rules Governing Practice Before the IRS
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Internal Revenue Service. IRS Form 2848 – Power of Attorney and Declaration of Representative
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Internal Revenue Service. Instructions for Form 2848 – Section: Revocation of a power of attorney
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Internal Revenue Service. Submit Forms 2848 and 8821 Online
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Internal Revenue Service. Instructions for Form 2848 – Section: Retention/Revocation of Prior Power(s) of Attorney