An EFIN is how the IRS identifies a firm that completed the e-file application and passed suitability. It is not a PTIN and it is not a CAF number. This page is the firm admin pack: e-Services access, ERO when you e-file for clients, Principal and Responsible Official data, the fingerprint path when credentials are not entered, the suitability wait the IRS states, and where the acceptance letter lives on the staff roster.
Each preparer still renews a PTIN on the PTIN renewal checklist. CAF posting for authorizations is the CAF number guide. Once you can e-file, the Form 8879 process before transmit is the Form 8879 e-file authorization workflow.
01
This is not legal advice
This page is general information, not legal advice. Become an authorized e-file provider, the EFIN FAQs, Publication 3112, and the e-file mandate FAQ are the texts to read. This page does not invent fees, denial rates, or wait times beyond the up to 45 days the IRS states for application approval.
02
PTIN versus EFIN versus CAF
An EFIN identifies firms that completed the IRS e-file application to become an authorized IRS e-file provider. After the provider completes the application and passes a suitability check, the IRS sends an acceptance letter that includes the EFIN. Providers need an EFIN to electronically file tax returns. The firm owns the EFIN. EFINs are not transferable, even if you transfer the business by sale, gift, or other disposition. (FAQs about EFINs)
| Number | What it is for | Who owns it | Where it lives |
|---|---|---|---|
| PTIN | Preparing or assisting with federal returns for pay | The individual preparer | IRS Tax Professional PTIN System. Each person renews. |
| EFIN | Electronic filing as an authorized IRS e-file provider | The firm. Not transferable. | e-file application and the IRS acceptance letter. |
| CAF | Recording third party authorizations such as Form 2848 and Form 8821 | Individual or business | Centralized Authorization File. First recorded authorization assigns it. |
Anyone who prepares or assists in preparing federal tax returns for compensation must have a valid PTIN before preparing returns. That is a person requirement. EFINs are issued on a firm basis. All tax return preparers in the firm are covered by the one EFIN. Do not treat a PTIN as proof you may e-file, and do not type an EFIN onto a CAF form. (PTIN requirements for tax return preparers, E-file mandate FAQ)
The EFIN FAQ currently states there is no fee to obtain an EFIN. You must apply and pass a suitability check. PTIN application and renewal have their own fee on the PTIN page. This page does not quote other fees. (FAQs about EFINs)
03
Create e-Services access and choose ERO
The e-file application lives under e-Services, e-file provider services. Sign in with an existing account or create a new account. Once essential individuals are approved for an e-Services account, the firm can begin the application. If you are a return preparer and want to e-file for clients, select Electronic Return Originator (ERO). (Become an authorized e-file provider)
Publication 3112 says an individual representing the firm can begin after creating a Secure Access account, and that before submitting, all Principals and Responsible Officials must create an e-Services account and enter information on the application. You can save progress and return. Plan for the IRS stated window: it can take up to 45 days from the date of submission for the IRS to approve the e-file application. (Publication 3112, Become an authorized e-file provider)
Reporting Agents are a different provider option. Publication 3112 says reporting agents must submit Form 8655 prior to or when they submit an IRS e-file application. If payroll filing for clients is the work, read the Form 8655 checklist as well. (Publication 3112)
04
Principals, Responsible Officials, and fingerprints
The application must include a principal, a responsible official, and a primary contact, who may all be the same person. A partnership should list each partner who has 5% or more interest. A corporation should list the president, vice president, secretary, and treasurer. (FAQs about EFINs)
If the Principal or Responsible Official is certified or licensed, such as an attorney, CPA, or enrolled agent, they must enter their current professional status information. Individuals who do not provide this information need to be fingerprinted using the IRS authorized vendor. After you submit, each Principal and Responsible Official schedules their own Livescan appointment from the scheduling link on the application summary. (Become an authorized e-file provider)
Publication 3112 also says Principals and Responsible Officials must be United States citizens or aliens lawfully admitted for permanent residence, and at least 18 as of the date of application. Licensed Public Accountants must provide fingerprints even though CPAs enter credentials. Read the current publication for the credential list before you tell a partner they can skip Livescan. (Publication 3112)
05
Suitability check and the 45 day window
After you submit the application and the required information, the IRS conducts a suitability check. That check may involve a credit check, a tax compliance check, a criminal background check, and a check for prior noncompliance with IRS e-file requirements. If the application is approved, the IRS sends an acceptance letter with your EFIN. (Become an authorized e-file provider)
- Keep the tracking number the application gives you after a successful submission.
- Track fingerprint done or credentials entered for every Principal and Responsible Official.
- Do not tell a client a date earlier than the IRS up to 45 day window.
- If you need status, Publication 3112 points to the e-help Desk at 866-255-0654 and the e-file provider services page.
Specified tax return preparers who reasonably expect to file 11 or more covered returns must e-file those returns they file, with the exceptions on the mandate FAQ. Becoming an authorized provider is how you get the EFIN that makes that possible. There is no fee for that application on the Become an authorized e-file provider FAQ path, and the process takes up to 45 days. (E-file mandate FAQ)
06
Store the letter and update software
Put the acceptance letter and the EFIN in the password manager and on the same staff roster you already use for PTIN and CAF. Publication 3112 says providers must protect EFINs from unauthorized use and never share them, including renting, leasing, purchasing, or transferring them when the business changes hands. The new entity must get its own EFIN from the IRS. (Publication 3112)
Then update the e-file software with the firm EFIN. A WISP that already lists where identifiers live is the WISP for tax preparers. Do not leave the only copy of the letter in one owner's email.
07
The application tracker
One row for the firm application. If you later add a location that needs its own EFIN, duplicate the row. Publication 3112 says a separate EFIN is required for each fixed location that originates electronic submission of returns.
| Column | What you log |
|---|---|
| Submitted | Date you submitted the e-file application. |
| Tracking number | The number the system gave you. Keep it. |
| Fingerprint done | Credentials entered, Livescan complete, or not applicable for that person. |
| Accepted | Yes, no, or pending. Date of the acceptance letter. |
| EFIN stored | Last four on the roster. Full number in the password manager, next to PTIN and CAF. |
| Software updated | The product you actually transmit with now has this EFIN. |
08
Download the EFIN tracker
Download the PTIN versus EFIN versus CAF table and application tracker. The tax season operator can draft a named chase when a Principal still has a blank fingerprint or credentials row. Your staff approve what goes out. Your CPA reviews and signs every return.
Keep reading on Fabren
Next step
Want a named chase when a Principal still has a blank fingerprint row?
The tax season operator drafts that follow up. Your staff approve what goes out. Your CPA reviews and signs every return.
See the tax season operatorRelated guides
Tax season
How to Get Clients to Send Tax Documents on Time
Templates
Missing Tax Documents Email Templates: 5 Emails and Texts
Tax season
TaxDome Document Chasing Workflow for Tax Season
Tax season
Karbon Client Request Reminders: How to Run Them in 1040 Season
Assistant
What to Delegate to an AI Assistant (and What to Keep)
Automation
What Small Accounting Firms Should Automate First
Tax season
CPA Firm Workflow During Tax Season
Practice ops
How to Go Paperless at a Tax Firm
AI tools
How to Choose an AI Tool for a CPA Firm
Assistant
Field Service Dispatch for 1 to 5 Person Shops
Practice ops
How Small Firms Run Accounting for Many Client Companies
Automation
What a Client Advisory Services (CAS) Firm Can Automate for Each Client
Practice ops
Document Routing Workflow for a Tax or CPA Firm
Practice ops
Client Intake and Task Tracking for Small Accounting Firms
Tax season
Canopy Client Request Reminders: How Tax Firms Set Them Up
Practice ops
Month End Close Checklist for Small Accounting Firms
Bookkeeping
Automating Bookkeeping Categorization in QuickBooks Online
Bookkeeping
Bank Reconciliation Prep in Xero for Bookkeeping Clients
Practice ops
Client Onboarding Workflow for a CPA Firm
Templates
Engagement Letter and Onboarding Email Templates for Bookkeeping Clients
Practice ops
How a Small Accounting Firm Gets More Capacity From Its Existing Team
AI tools
What an AI Operator Does Inside a 1 to 5 Person Accounting Firm
Templates
Chasing Bookkeeping Receipts: Missing Statements Emails That Name the Item
Bookkeeping
AP Bill Approval Workflow for Bookkeeping Clients in BILL or QuickBooks
Bookkeeping
Monthly Client Reporting Package for Small Business Bookkeeping
Tax season
Drake Documents and E-Sign: Client Document Workflow for Tax Season
Practice ops
TaxDome Client Onboarding Pipeline for New Accounting Clients
Tax season
Liscio Document Request Workflow for Tax and CPA Firms
Templates
Form 4868 and Form 7004 Extension Season Client Communication
Practice ops
IRS Notice Response Intake Workflow for Small Tax Firms
Templates
1099 Season Data Collection Workflow with Templates
Assistant
Inbox Triage and Follow Up for a Solo Consultant
Assistant
Appointment Reminders and Invoice Follow Up for a Small Service Business
Tax season
Estimated Tax Payment Reminders for Clients: A Firm's Quarterly System
Practice ops
Form 8821 and IRS Transcripts: Submit Authorization, Then Pull TDS Records
Bookkeeping
Year End Payroll W-2 Checklist for Small Business Bookkeeping Clients
Practice ops
CPA Disengagement Letter: End the Engagement and Return Client Records
Tax season
Tax Organizer Workflow: Send, Track and Close Organizers Before Tax Season
Bookkeeping
Bookkeeping Cleanup Checklist: Scoping a Catch Up Job Before You Quote It
Assistant
Quote Follow Up Emails for Small Service Businesses: Three Touches Then Stop
Bookkeeping
QuickBooks Online Year End Close Checklist for Bookkeepers
Tax season
Tax Return Review Checklist: A Second Look Before the Client Sees the Return
Bookkeeping
Sales Tax Filing Calendar: Tracking Every Client's Due Dates Across States
Tax season
S Corp Reasonable Salary: The Year End Review Your Firm Should Run
Assistant
Missed Call Text Back: Setting It Up Without Annoying Customers
Assistant
How to Ask Customers for Google Reviews (and Stay Inside the Rules)
Tax season
PTIN Renewal Checklist for a Tax Firm: Roster, Sequence, Hard Stop
Tax season
WISP for Tax Preparers: Writing a Security Plan a Small Firm Will Actually Follow
Tax season
7216 Consent Form: When Tax Preparers Need It and How to Collect It
Tax season
Tax Preparation Engagement Letter: What to Include and How to Get It Signed
Tax season
Year End Tax Planning Checklist: The December Client Outreach Small Firms Can Run
Assistant
How to Reduce No Shows: Reminder and Rebooking Steps for Small Service Businesses
Bookkeeping
Bookkeeping Client Onboarding Checklist for Small Firms
Practice ops
Secure Client Portal for Accounting Firms: What to Require Before You Switch
Tax season
Form 2848 Power of Attorney: A Small Firm Workflow From Signature to CAF
Tax season
CAF Number for Tax Professionals: How to Get, Link and Find Yours
Tax season
Drake Tax Organizers: Batch Send Before Tax Season Without Drowning Clients
Bookkeeping
How Bookkeepers Choose Client Accounting Services Software
Tax season
Form 8879 E-File Authorization: A Small Firm Workflow Before You Transmit
Practice ops
Form 4506-C and IVES: A Tax Firm Workflow for Income Verification Requests
Bookkeeping
W-9 Collection Workflow for Bookkeepers Before 1099 Season
Bookkeeping
Form 8655 Reporting Agent Authorization: A Bookkeeping Firm Checklist
Practice ops
CPA Firm Client Offboarding Checklist: Access, Records and Clean Handoff
Tax season
Form 8867 Due Diligence Checklist for Small Tax Firms
Tax season
Identity Protection PIN for Tax Firms: Capture, Store and Use on E-File
Bookkeeping
Form 8822-B Business Address Change: A Bookkeeping Firm Checklist
Bookkeeping
EFTPS Enrollment for Bookkeeping Clients: A Firm Admin Checklist
Tax season
Form 8878 E-File Authorization for Form 4868 Extensions
Bookkeeping
Form SS-4 EIN Application: A Checklist for Bookkeeping and CPA Firms
Tax season
Form 2553 S Corp Election Checklist for Tax Firms
Bookkeeping
Form 941 Quarterly Filing Checklist for Bookkeepers (With Schedule B)
Bookkeeping
Form W-2c Corrections: A Payroll Firm Workflow After Year End
Tax season
Form 9465 and IRS Payment Plans: A Tax Firm Client Checklist
Tax season
Form 14039 Identity Theft Affidavit: What a Tax Firm Does Next
Tax season
Form 8453 E-File Transmittal: Sending Paper Documents After E-File
Practice ops
Print Automation for Accounting Firms: Batch Client Copies, Signature Packs and PDFs
Practice ops
Record Retention Policy for CPA Firms: A Template and Schedule
Tax season
Tax Document Checklist for Clients (2026 Season): Printable and CSV
Tax season
Form 1040-X Amended Returns: A Tax Firm Workflow From Error to Status Check
Bookkeeping