Third-Party Tax Authorization: Forms 8821, 2848, and 4506-C

To let someone else see or handle your tax information, you file one of four IRS third party authorization forms, and which one you need depends on how much access you’re granting. Form 8821 lets an appointee view your records. Form 2848 gives a qualified representative power of attorney to act on your behalf. Form 4506-C authorizes a lender to pull your transcripts through the Income Verification Express Service. And the Third Party Designee checkbox on your Form 1040 covers a single return for one year. Federal law keeps your return information confidential under Section 6103 of the Internal Revenue Code, so the IRS won’t share anything without your written consent.¹

Matching the Form to What You Actually Need

Picking the wrong form is the most common mistake, and it can set you back weeks. Start with what the other person needs to do, not who they are.

Someone needs to see or receive your tax information but won’t speak for you: Form 8821.
A tax professional will negotiate, sign agreements, or handle an audit or appeal on your behalf: Form 2848.
A bank or lender needs your transcripts to verify income: Form 4506-C.
You want to let a friend or preparer answer IRS questions about one specific return you’re filing right now: the Third Party Designee checkbox on that return.

The Third Party Designee option is the lightest. When you file your return, you name a person, list a phone number, and set a five-digit PIN. That authorization expires one year after the return’s due date and covers only that return.² Anything broader takes a dedicated form.

Form 8821: View-Only Access

Form 8821 is the right choice when someone needs to see your tax records but doesn’t need to negotiate with the IRS. A mortgage broker pulling income verification, a financial advisor reviewing your situation, or a family member helping you keep track of notices all fit here. The appointee can inspect and receive your confidential tax information, in writing or verbally, for the tax types and periods you list.³

What Form 8821 does not do: it does not let the appointee argue a penalty, sign a settlement, or agree to extend a deadline. If you need any of that, use Form 2848.

The authorization stays in effect until you revoke it; there’s no automatic expiration. One quirk on future years: the IRS won’t record tax periods that extend more than three years past December 31 of the year it receives the form.⁴ File in 2026 and list 2030, and that year won’t make it onto the authorization.

Form 2848: Power of Attorney

Form 2848 is what you file when you need a professional to represent you before the IRS. A representative with a valid power of attorney can receive copies of your IRS notices, negotiate payment agreements, attend audit hearings, sign documents that bind you, and handle appeals.⁵

Not everyone qualifies. The person you name has to be eligible to practice before the IRS and must declare their designation in Part II of the form. Eligible representatives include:

Attorneys admitted to practice in any U.S. state
Certified Public Accountants licensed in any state
Enrolled Agents holding an IRS-issued enrollment card
Enrolled Actuaries and Enrolled Retirement Plan Agents
Officers or full-time employees of a business, for that business’s tax matters only
Immediate family members such as a spouse, parent, child, or sibling
Unenrolled return preparers who signed your return, with significant limits

Unenrolled preparers get the narrowest authority. They can represent you only during an examination of a return they personally prepared and signed, and only before revenue agents or customer service representatives. They cannot appear before appeals officers or revenue officers, sign closing agreements, or extend deadlines for you.⁶

A power of attorney runs until you revoke it or your representative withdraws.⁷ Watch for the automatic trigger: if you file a new Form 2848 naming a different representative for the same tax matter and period, the IRS revokes the prior authorization on its own.

Form 4506-C: Letting a Lender Pull Your Transcripts

Applying for a mortgage or another loan usually means your lender wants tax transcripts, not copies of your returns. Form 4506-C handles that. You sign it, the lender submits it through the Income Verification Express Service, and the IRS sends transcript data directly to the lender.⁸

Form 4506-C is narrower than Form 8821. It authorizes the lender to receive transcripts through IVES for the returns you list and nothing more. Most borrowers see this form for the first time across the desk at their lender’s office rather than seeking it out on their own.

Filling Out the Forms Without Getting Them Returned

Forms 8821 and 2848 share most of their information requirements, so preparing one is nearly the same work as preparing the other. Incomplete forms get sent back rather than processed, so accuracy up front is worth the extra minute.

Your Taxpayer Information

Enter your name and taxpayer identification number exactly as they appear on your most recent return: Social Security Number for individuals, Employer Identification Number for a business.⁹ A single transposed digit can keep the authorization from matching your account.

Appointee or Representative Information

You need the full name, mailing address, and phone number of every person you’re authorizing. On Form 2848, include the representative’s Centralized Authorization File (CAF) number if they have one; if they don’t, enter “None” and the IRS will assign one.¹⁰ The CAF number is a nine-digit identifier the IRS uses to track third-party authorizations, separate from a Social Security Number or PTIN.¹¹

Tax Type and Periods

This is where most forms fail. You have to specify the type of tax (income, employment, excise, estate, gift, civil penalty, and so on), the form number (1040, 941, 720, and so on), and the exact tax years or quarterly periods. Writing “all years” or “all periods” instead of specific dates will get your form returned; the IRS instructions are explicit that any authorization with a general reference like that comes back to you.⁴

List each combination of tax type and period on its own line. Two years of income tax plus a 2024 employment tax issue is at least two rows.

Signature and Date

Both forms require your signature and the current date. Form 8821 states it plainly: if the form is not completed, signed, and dated, it will be returned.⁹ Electronic signatures are accepted when you submit through the IRS online portal.

How to Submit Your Authorization

You can submit online, by fax, or by mail. The IRS estimates about seven business days from receipt to processing for both Form 2848 and Form 8821, though times climb during peak periods.¹²

Online

The IRS accepts uploads of Forms 2848 and 8821 through its online portal. You’ll need to sign in or create an IRS account, which requires identity verification, and the portal accepts either electronic or handwritten signatures on uploaded forms.¹³

Fax or Mail

Where the form goes depends on the taxpayer’s state of residence. The IRS maintains two domestic CAF processing centers and one international team:⁶

Eastern states, from Maine to Florida and west to Mississippi: Memphis, TN, fax 855-214-7519
Western states, from Minnesota to Alaska and south to Texas: Ogden, UT, fax 855-214-7522
International filers, including APO/FPO addresses, U.S. territories, and foreign countries: Philadelphia, PA, fax 855-772-3156, or 304-707-9785 from outside the U.S.

Fax numbers can change without notice, so check the current numbers on the IRS website before sending. Fax generally beats mail because there’s no postal transit time.

The IRS doesn’t send a confirmation when your authorization is processed, which means you or your representative may need to check status separately after submission.

Revoking or Changing an Authorization

You can cancel an authorization at any time by notifying the IRS in writing.

Revoking Form 2848

If you have a copy of the original, write “REVOKE” across the top of the first page, sign and date below the annotation, and fax or mail it to the appropriate CAF unit. If you don’t have a copy, send the IRS a signed and dated statement that identifies the representative by name and address, lists the tax matters and periods, and states that the authorization is revoked.¹⁰

Filing a new Form 2848 for the same tax matter and period automatically revokes the prior one. To keep your existing representative and add another, attach a copy of the prior authorization to the new filing.⁷

Revoking Form 8821

Same approach: write “REVOKE” across the top of the prior form, add a current signature and date under the original, and send it in. Without a copy, mail a signed notification identifying the appointee, the tax matters, and the periods. Filing a new Form 8821 automatically revokes all prior tax information authorizations on file unless you attach copies of the ones you want to keep and check the appropriate box on line 5.⁴

That automatic revocation catches people off guard. Adding a second appointee without checking the box can silently cut off the first one.

Authorizations Don’t Survive a Death

When someone dies, existing authorizations on their account do not transfer to anyone. An executor, administrator, or other fiduciary who needs to handle the decedent’s tax affairs establishes their authority separately by filing Form 56, Notice Concerning Fiduciary Relationship.¹⁴ Form 56 tells the IRS a fiduciary relationship exists; once on file, the IRS treats the fiduciary as the taxpayer for purposes of filing returns, paying tax, and receiving correspondence. It is not a power of attorney and does not substitute for Form 2848. If the fiduciary then wants to hire a tax professional to represent the estate, they file Form 2848 in their fiduciary capacity.¹⁵

What Your Authorized Person Can and Can’t Do With the Information

The authorization system exists because unauthorized disclosure of tax information is a serious federal offense. A government employee who willfully shares your return data without authorization commits a felony punishable by up to five years in prison, a fine of up to $5,000, or both, and federal employees convicted face mandatory termination.¹⁶

The person you authorize is bound too. Under Section 6103(c), a designated recipient can only use your return information for the purpose you consented to and cannot pass it along to anyone else without your express permission.¹

1
Office of the Law Revision Counsel. 26 USC 6103 – Confidentiality and Disclosure of Returns and Return Information
2
Internal Revenue Service. Know the Different Types of Authorizations for Third-Party Representatives
3
Internal Revenue Service. About Form 8821, Tax Information Authorization
4
Internal Revenue Service. Instructions for Form 8821
5
Internal Revenue Service. About Form 2848, Power of Attorney and Declaration of Representative
6
Internal Revenue Service. Instructions for Form 2848
7
Internal Revenue Service. Power of Attorney and Other Authorizations
8
Internal Revenue Service. Income Verification Express Service
9
Internal Revenue Service. Form 8821 – Tax Information Authorization
10
Internal Revenue Service. Instructions for Form 2848
11
Internal Revenue Service. What Is a CAF Number
12
Internal Revenue Service. Processing Status for Tax Forms
13
Internal Revenue Service. Submit Forms 2848 and 8821 Online
14
Internal Revenue Service. Instructions for Form 56
15
Internal Revenue Service. Deceased Person
16
Office of the Law Revision Counsel. 26 USC 7213 – Unauthorized Disclosure of Information