IRS

IRS Modernized e-File (MeF) API

Application-to-Application (A2A) system enabling authorized software developers and transmitters to electronically submit tax returns directly to the IRS. Supports individual and business tax forms including Form 2290, Form 720, Form 8849, and more. Requires TLS 1.2 or higher. Technical specifications available in IRS Publication 4164. Current WSDL version is R10.9 for tax year 2025/processing year 2026.

GitHub

Documentation

📖
Documentation
https://www.irs.gov/e-file-providers/information-and-technical-guidance-for-software-developers-and-transmitters
📖
GettingStarted
https://www.irs.gov/tax-professionals/get-an-api-client-id

Other Resources

🔗
StatusPage
https://www.irs.gov/e-file-providers/modernized-e-file-mef-status

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API entry from apis.yml

apis.yml Raw ↑ 
aid: irs:mef
name: IRS Modernized e-File (MeF) API
description: Application-to-Application (A2A) system enabling authorized software developers and transmitters
  to electronically submit tax returns directly to the IRS. Supports individual and business tax forms
  including Form 2290, Form 720, Form 8849, and more. Requires TLS 1.2 or higher. Technical specifications
  available in IRS Publication 4164. Current WSDL version is R10.9 for tax year 2025/processing year 2026.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://www.irs.gov/e-file-providers/information-and-technical-guidance-for-software-developers-and-transmitters
baseURL: https://la.www4.irs.gov
tags:
- E-File
- Tax Returns
- Electronic Filing
- Software Developers
tags_raw:
- e-File
- Tax Returns
- Electronic Filing
- Software Developers
properties:
- type: Documentation
  url: https://www.irs.gov/e-file-providers/information-and-technical-guidance-for-software-developers-and-transmitters
- type: GettingStarted
  url: https://www.irs.gov/tax-professionals/get-an-api-client-id
- type: StatusPage
  url: https://www.irs.gov/e-file-providers/modernized-e-file-mef-status