generated: '2026-07-18' method: searched source: https://www.columntax.com/ compliance_program: url: https://www.columntax.com/ certifications: - SOC 2 irs_authorized_efile_provider: true encryption: AES-256 at rest, TLS/HTTPS in transit standards: - id: soc2 conforms: true evidence: 'SOC 2 certified (Type I/II) per columntax.com trust/security claims.' - id: irs-authorized-efile conforms: true evidence: 'IRS Authorized e-File Provider.' - id: irc-7216-consent conforms: true evidence: 'Tax return objects expose information_disclosure_consent_status and information_use_consent_status (IRS Section 7216 taxpayer consent).' - id: rest conforms: true evidence: 'JSON-over-HTTPS REST API with resource-oriented paths under /v1/.' - id: http-basic-auth conforms: true evidence: 'RFC 7617 HTTP Basic authentication.' - id: oauth2 conforms: false - id: openid-connect conforms: false - id: rfc9457-problem-details conforms: false evidence: 'Errors return JSON but not application/problem+json.'