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Yangjini — AI Tax Assistant for Overseas Stock Investors

Yangjini — AI Tax Assistant for Overseas Stock Investors

Young Kim / December 1, 2018

Yangjini (양지니) — AI Tax Assistant

Yangjini (양지니, "Yang Genie") is an enterprise-grade AI-powered tax assistant for automated overseas stock capital-gains tax calculation and National Tax Service (NTS) integration. This system was developed in collaboration with Shinhan Securities — one of Korea's largest securities firms.

Partner

Shinhan Securities — One of Korea's leading securities firms, providing domain expertise and enterprise integration for the retail investor tax reporting workflow.

System Overview

As Korean investors increasingly participate in global markets, accurate and automated tax reporting for overseas stock transactions became critical. Yangjini streamlines the complex process of calculating capital gains on foreign securities and integrating directly with Korea's National Tax Service.

Key Features

Automated Tax Calculation

  • Real-time capital gains/losses computation for overseas stock transactions
  • Multi-currency support with historical exchange rate application
  • FIFO, LIFO, and weighted average cost basis methods
  • Handling of corporate actions (splits, dividends, mergers)

NTS Integration

  • Direct API integration with National Tax Service systems
  • Automated form generation for annual tax filing
  • Pre-filled return data for investor convenience
  • Audit trail and compliance documentation

Portfolio Analysis

  • Transaction history aggregation across global markets
  • Cost basis tracking and adjustment
  • Performance attribution with tax impact
  • Year-end tax-loss harvesting recommendations

Technical Architecture

Enterprise Integration

  • Secure connection to Shinhan Securities core trading systems
  • Real-time market data feeds from global exchanges
  • High-availability design for tax season peak loads
  • Encrypted data handling for sensitive financial information

Compliance Framework

  • Korean tax law compliance (Income Tax Act provisions)
  • Regulatory reporting automation
  • Change management for tax law updates
  • Comprehensive audit logging

Impact

  • Automated tax calculations for thousands of retail investors
  • Reduced manual processing time by 90%+
  • Improved accuracy in NTS submissions
  • Streamlined year-end reporting workflow

Technology Stack

| Layer | Technologies | |-------|--------------| | Backend | Enterprise Java, Spring | | Database | Oracle | | Integration | REST APIs, Secure FTP | | Reporting | Custom report generation |

Business Context

Yangjini was developed as part of Shinhan Securities' initiative to provide comprehensive investor services and ensure regulatory compliance for retail clients trading in international markets. The system handles the complexity of multi-jurisdiction tax rules while providing a seamless experience for end users.