Tax ID Validator checks US tax identification numbers including SSNs, EINs, and ITINs for structural validity. It accepts formatted or unformatted strings and returns validation results, normalized formatting, masked numbers, and the last four digits.
nodejs python java api dotnet rest-api npm-package android-library text-processing python-package nuget-package ssn-validator apiverve taxidvalidator tax-id-validation-api tax-id-verification-api ssn-validation-api ein-validation-api
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Updated
Nov 9, 2026 - C#