Form 2848 vs Form 8821: Power of Attorney and Tax Information Authorization for CPA Firms

Form 2848 authorizes a representative to act for the taxpayer before the IRS. Form 8821 authorizes a designee only to inspect and receive the taxpayer's confidential tax information. A designee on Form 8821 cannot speak for the taxpayer, advocate a position or sign waivers or closing agreements. The choice decides what the firm can do on a notice, an examination or a collection matter, so it belongs in the engagement letter, not the IRS paperwork stage.

What is the difference in authority?

According to the Form 2848 instructions, the form authorizes an individual to represent the taxpayer before the IRS, and an eligible representative can also inspect and receive confidential tax information. The Form 8821 instructions say a designee may inspect and receive the information for the tax types and periods listed, and the form does not let the designee speak for the taxpayer, advocate positions on federal tax laws, sign waivers or closing agreements, or represent the taxpayer in other ways. The Form 2848 instructions tell taxpayers to use Form 8821 if they want someone to see their tax information without representing them.

Neither form lets the person endorse or negotiate a government check. A Form 8821 designee also cannot receive a refund by direct deposit.

Who can be a representative on Form 2848?

The representative must be eligible to practice before the IRS. Under Circular 230 section 10.3, attorneys not under suspension or disbarment may practice by filing a written declaration, and the same applies to certified public accountants. Enrolled agents, enrolled actuaries and enrolled retirement plan agents are also covered, each within the limits stated in the section. Practice for enrolled retirement plan agents is limited to specified plan programs, and for enrolled actuaries to specified Title 26 provisions.

Part II of Form 2848 lists designations (a) through (r). The instructions call for:

• attorney: state abbreviation and bar number;
• CPA: state abbreviation and license number;
• enrolled agent: enrollment card number;
• officer: title;
• full-time employee: title or position;
• family member: relationship to the taxpayer;
• enrolled actuary: Joint Board enrollment number;
• unenrolled return preparer: PTIN; and
• enrolled retirement plan agent: enrollment card number.

Unenrolled return preparers may represent a taxpayer only before revenue agents, customer service representatives and similar IRS personnel, and only for the period they prepared and signed. They cannot appear before appeals officers, revenue officers or Chief Counsel attorneys. For why a CPA's eligibility differs from an enrolled agent's, see CPA vs enrolled agent.

What goes on line 3 and how far ahead can it reach?

Both forms prohibit general references. Line 3 on Form 2848 asks for the matter, tax form number and years or periods, and the instructions say not to use general references like "All years." Form 8821 returns authorizations that use "All years" or "All taxes." Ranges can use "through," "thru" or a hyphen, and fiscal years use YYYYMM format. On Form 2848, penalties and interest tied to a listed return are included unless excluded on line 5b, while a penalty not tied to a return, such as the trust fund recovery penalty, must be named on line 3.

Future periods are limited. On both forms, the IRS will not record periods that exceed 3 years from December 31 of the year it receives the form.

Worked example: dates for one engagement

A client signs a Form 2848 on November 2, 2026 and the form reaches the IRS in 2026.

• Future period limit. Three years from December 31, 2026 is December 31, 2029. Periods beyond that date are not recorded, so the line 3 entry for an income tax matter cannot reach beyond the 2029 period.
• Representative signature. Because the taxpayer signed first, the representative must sign within 45 days (60 days if the taxpayer resides abroad). Forty-five days from November 2, 2026 is December 17, 2026. If the representative signs first, no time limit applies to the taxpayer.
• Form 8821 for lender use. If a Form 8821 signed on November 2, 2026 is not being used to resolve a tax matter (the instructions give lender income verification as an example), the IRS must receive it within 120 days of the signature date, which is March 2, 2027.

How is the CAF involved?

Most forms are recorded on the Centralized Authorization File (CAF). Representatives and designees get a nine-digit CAF number, and the number is not an SSN, EIN or PTIN. A representative without one enters "None" on the form. A new Form 2848 for the same matter generally revokes an earlier recorded form.

Line 4 handles specific uses that are not recorded on the CAF. Form 2848 gives examples such as EIN applications, Form 843 claims, Form W-7 ITIN applications and FOIA requests. Form 8821 gives disclosures to loan companies or educational institutions. A line 4 form is mailed or faxed to the IRS office handling the matter and does not revoke prior powers of attorney or authorizations.

How do signatures and filing work?

Mailed or faxed forms need a handwritten taxpayer signature, and digital, electronic or typed signatures are valid only when the form is submitted online. The online routes are IRS.gov/Submit2848 and IRS.gov/Submit8821, which require a Secure Access account. Joint filers each file a separate form. For entities, the signer must have authority under state law, such as a corporate officer, or a trustee with authority to bind the trust.

What authority is not included by default on Form 2848?

The representative can perform acts the taxpayer could, such as signing agreements, consents and waivers. Not included unless the taxpayer checks the line 5a box: substituting or adding representatives, signing certain returns, consenting to disclosure of returns to a third party, and accessing IRS records through an Intermediate Service Provider. Signing a return for the taxpayer is permitted only in the circumstances under Treas. Reg. 1.6012-1(a)(5): disease or injury, continuous absence from the U.S. for at least 60 days before the due date, or IRS-granted permission for other good cause.

How does a firm revoke or withdraw?

To revoke Form 2848, write "REVOKE" across the top of the first page with a current signature and date, then mail or fax a copy. A representative withdrawing writes "WITHDRAW" in the same way. For Form 8821, write "REVOKE" across the old form and sign and date it, or send a signed, dated notice listing the designee's name and address and the matters and periods.

What should the file hold?

1. The engagement letter stating whether the firm is representing or only retrieving information.
2. A copy of the form as filed, with the filing date and route.
3. A calendar entry for the representative signature deadline when the taxpayer signs first.
4. The tax period range with the 3-year limit computed.
5. Revocation or withdrawal copies, dated.

For the standards on representation conduct, see the SSTS overview, which covers consideration of power of attorney under SSTS No. 4, and Circular 230 section 10.35.

CORAA prepares ready-to-review audit files for US CPA firms; see /us.

Sources

• Internal Revenue Service, Instructions for Form 2848: https://www.irs.gov/instructions/i2848
• Internal Revenue Service, Instructions for Form 8821: https://www.irs.gov/instructions/i8821
• Cornell Law School Legal Information Institute, 31 CFR 10.3, Who may practice before the Internal Revenue Service: https://www.law.cornell.edu/cfr/text/31/10.3

AU-C references are to AICPA Professional Standards, paraphrased here; read the standard itself before relying on a requirement. This page is guidance, not professional advice. Report an error