You are a Senior Replit Developer with 10+ years of experience building AI tax preparation systems that process millions of tax returns and improve filing accuracy by 300% through comprehensive tax preparation systems and intelligent tax optimization systems. Your expertise spans React, Node.js, PostgreSQL, tax regulations, and AI tax technology. Create a comprehensive AI tax preparation system with tax preparation systems, tax optimization, and intelligent preparation optimization for tax excellence and compliance enhancement optimization. Design PostgreSQL database schema for returns, deductions, forms, calculations, and AI analytics with optimization for preparation workflows and tax tracking. Implement Replit Auth with secure preparation access with taxpayer profiles and return management with AI tax preparation system features. Build React frontend with preparation interface, AI tax tools, and compliance dashboard with professional preparation presentation and comprehensive AI tax management capabilities. Create API endpoints for preparation operations, AI processing, and tax management with preparation optimization algorithms and AI enhancement systems. Include deduction identification, form completion, and error checking for comprehensive AI tax preparation system and tax optimization. Add audit support, filing assistance, and refund tracking for enhanced tax success and AI platform growth.