Tax Info Center
TIN Match
Test Submission
XML Parser
Manage Schema
PDF ID Generator
Form PDF
IRS Check
AI Prompt
Version 1.2.0
TIN Match
Name Control
Step 1 — Authentication
Client ID
Key ID (KID)
User ID (e-Services username)
Environment
AATS / Test (api.alt.www4.irs.gov)
Production (api.www4.irs.gov)
Get Access Token
Token Result
Client JWT — header / payload
User JWT — header / payload
Raw Response
.
Step 2 — TIN Match Request
TIN Type
EIN
SSN
ITIN
UNKNOWN
TIN
(9 digits, no dashes)
Taxpayer Name
Submit
TIN Match Result
Request Sent
Raw Response
Diagnostic Log
Clear
Tax Info Center
Test Submission
XML Parser
Manage Schema
PDF ID Generator
Form PDF
IRS Check
AI Prompt