# IRS Modernized e-File (MeF) API

**Canonical:** https://apis.io/apis/tax-reporting-templates/irs-mef-api/  
**Provider:** Tax Reporting Templates — https://apis.io/providers/tax-reporting-templates/  
**Base URL:** https://la1.www4.irs.gov/mef  
**Documentation:** https://www.irs.gov/tax-professionals/e-file-providers-partners/modernized-e-file

IRS Modernized e-File (MeF) API is one of 6 APIs that [Tax Reporting Templates](https://apis.io/providers/tax-reporting-templates/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Compliance, E-File, Federal Tax, IRS, and Tax. The published artifact set on APIs.io includes API documentation.

The IRS Modernized e-File (MeF) system is the primary e-filing platform for federal tax returns. It defines XML schemas and business rules for individual, business, and employment tax forms. Software developers use these schemas to build compliant tax preparation and filing software.

## Machine-readable artifacts (4)

- **Documentation** — https://www.irs.gov/tax-professionals/e-file-providers-partners/modernized-e-file
- **Documentation** — https://www.irs.gov/e-file-providers/modernized-e-file-mef-schemas-and-business-rules
- **Guide** — https://www.irs.gov/pub/irs-pdf/p4164.pdf
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/tax-reporting-templates/refs/heads/main/apis.yml

## Other Tax Reporting Templates APIs (5)

- [TaxJar API](https://apis.io/apis/tax-reporting-templates/taxjar-api/)
- [Avalara AvaTax API](https://apis.io/apis/tax-reporting-templates/avalara-avatax-api/)
- [W-2 and 1099 Reporting Templates](https://apis.io/apis/tax-reporting-templates/w2-1099-reporting/)
- [Tax Reporting Templates Categories API](https://apis.io/apis/tax-reporting-templates/tax-reporting-templates-categories-api/)
- [Tax Reporting Templates Taxes API](https://apis.io/apis/tax-reporting-templates/tax-reporting-templates-taxes-api/)

## Tags

Compliance, E-File, Federal Tax, IRS, Tax

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/tax-reporting-templates/irs-mef-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/tax-reporting-templates/.