Echo Tax Return
Ultimate
AI-native tax preparation with 5,500+ engines, 57,000+ doctrines, IRS MeF e-file, and Claude Opus deep analysis.
14 Specialized Tax Engines
Each engine contains pre-compiled doctrine blocks with IRC authority, Treasury Regulations, and case law citations.
Production-Grade Tax Platform
Claude Opus Deep Analysis
CPA-grade tax reasoning via Claude subprocess. Three-layer response in milliseconds.
13-Step Tax Calculation
Full federal income engine: brackets, SE tax, AMT, NIIT, QBI, credits, optimization.
IRS MeF E-File
SOAP 1.1 + MIME multipart XML generation with A2A transmission and rejection auto-fix.
AES-256-GCM Encryption
Zero-knowledge PII protection. SSN, bank data encrypted at rest with field-level encryption.
Hash-Chained Audit Trail
SHA-256 append-only audit log. Every action tamper-evident and forensically verifiable.
220+ API Endpoints
Complete REST API with Zod validation, tiered rate limiting, and role-based access control.