IRS

IRS TIN Matching API

Allows payers to submit Taxpayer Identification Number (TIN) and name combinations to be matched against IRS records before filing information returns. Supports interactive matching of up to 25 combinations with immediate results and bulk matching of up to 100,000 combinations with results within 24 hours. Available as part of IRS e-Services.

GitHub

Documentation

📖
Documentation
https://www.irs.gov/tax-professionals/taxpayer-identification-number-tin-matching
📖
GettingStarted
https://www.irs.gov/tax-professionals/get-an-api-client-id

Other Resources

🔗
APIsJSON
https://raw.githubusercontent.com/api-evangelist/irs/refs/heads/main/apis.yml

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API entry from apis.yml

apis.yml Raw ↑ 
aid: irs:tin-matching
name: IRS TIN Matching API
description: Allows payers to submit Taxpayer Identification Number (TIN) and name combinations to be
  matched against IRS records before filing information returns. Supports interactive matching of up to
  25 combinations with immediate results and bulk matching of up to 100,000 combinations with results
  within 24 hours. Available as part of IRS e-Services.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://www.irs.gov/tax-professionals/taxpayer-identification-number-tin-matching
baseURL: https://la.www4.irs.gov
tags:
- TIN Matching
- Taxpayer Identification
- Information Returns
- Validation
properties:
- type: Documentation
  url: https://www.irs.gov/tax-professionals/taxpayer-identification-number-tin-matching
- type: GettingStarted
  url: https://www.irs.gov/tax-professionals/get-an-api-client-id