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Tax Residence Management

Cross-Border Compliance Platform for Belgium/Netherlands AI POC

🌍 Project Overview

A sophisticated cross-border tax compliance platform designed to help professionals manage their residence status and documentation between Belgium and the Netherlands. This proof-of-concept application demonstrates how technology can solve complex tax and social security compliance challenges.

  • Residence Tracking - Document time spent in each country for tax compliance
  • Work Distribution Documentation - Maintain evidence for 75/25 work requirements
  • Financial Activity Tracking - Record economic ties and business operations
  • Compliance Reporting - Generate reports for tax authorities
  • Multi-Platform - Web (Blazor) and mobile (MAUI) interfaces
  • AI Integration - Claude & Gemini guidance for complex situations

🎯 Key Features

  • 📍
    Residence Tracking - Track time spent in Belgium vs Netherlands with calendar integration
  • 📊
    Work Distribution Analysis - Monitor 75/25 work requirement compliance
  • 💼
    Financial Documentation - Log business activities and economic ties
  • 📄
    Report Generation - Create tax authority-ready compliance reports
  • 📱
    Mobile Access - Track activities on-the-go with MAUI app
  • 🤖
    AI Guidance - Get recommendations from Claude & Gemini on compliance strategies
  • 🔄
    Cloud Sync - Synchronize between web and mobile with cloud storage
  • 🔐
    Privacy First - Local storage with optional cloud backup

🏗️ Architecture & Technology

Technology Stack

.NET Ecosystem

.NET Aspire Blazor Server .NET MAUI

Data & Storage

SQLite Local-First Cloud Sync

Integration

Microsoft Graph API Claude API Gemini API

Architecture

Vertical Slice Feature-Driven Domain-Centric

Vertical Slice Architecture

The application uses vertical slice architecture, organizing code around business features rather than technical layers. Each feature is self-contained with UI, business logic, and data access integrated together, enabling:

  • Independent feature development
  • Minimal cross-feature dependencies
  • Easy testing and deployment
  • Clear business context mapping

💡 Business Requirements

Tax Compliance: Track time spent in each country to prove tax residence status and maintain evidence for Belgian social security retention benefits.
Work Distribution: Maintain documentation proving the 75/25 work distribution requirement between the two countries.
Financial Tracking: Document financial activities and economic ties to demonstrate proper tax residency classification.
Pension Optimization: Track and plan for optimal pension distribution using Belgium's favorable 10% tax rate.
Social Security: Maintain evidence for social security compliance across both countries' regulations.

📚 Documentation

Comprehensive documentation organized in the UserStories folder:

  • 01-TaxResidenceAnalysis.md - High-level analysis of requirements
  • 02-TechnicalRequirements.md - Detailed technical specifications
  • 03-VerticalArchitecture.md - Implementation guide for architecture
  • 04-ImplementationPlan.md - Detailed implementation specifications

🚀 Multi-Platform Experience

Web Dashboard (Blazor)

Full-featured web interface for comprehensive tracking, reporting, and configuration. Access from any browser with full functionality and visualizations.

Mobile App (MAUI)

Native cross-platform mobile app for on-the-go tracking. Works on iOS and Android with local-first data storage.

Cloud Synchronization

Seamless sync between web and mobile devices. Local data syncs to cloud, ensuring information is always up-to-date.

Calendar Integration

Integrates with Microsoft Graph API to pull calendar events for accurate residence tracking automation.

🤖 AI-Powered Guidance

Integration with multiple LLM providers for intelligent guidance on complex tax and compliance situations:

  • Claude API - Expert analysis and compliance recommendations
  • Gemini API - Alternative LLM provider for diverse perspectives
  • Context-Aware - Provides guidance based on user's specific situation and data
  • Real-Time Updates - AI adapts recommendations as situation changes

🎓 What This Project Demonstrates

The Tax Residence Management POC showcases expertise in:

  • ✅ Complex Domain Modeling - Tax and legal compliance requirements
  • ✅ Architecture Design - Vertical slice architecture for maintainability
  • ✅ Full-Stack .NET - Aspire, Blazor, MAUI integration
  • ✅ Cross-Platform Development - Web and mobile unified codebase
  • ✅ LLM Integration - Claude and Gemini for intelligent features
  • ✅ Cloud APIs - Microsoft Graph and cloud synchronization
  • ✅ Data Privacy - Local-first with optional cloud backup
  • ✅ Business Analysis - Deep understanding of cross-border tax needs

📋 Project Status

This is a proof-of-concept project currently in the planning and initial development phase. The comprehensive documentation provides the foundation for implementation, with code developed following the specified patterns and guidelines.

  • ✅ Requirements analysis complete
  • ✅ Technical specifications documented
  • ✅ Architecture designed
  • ✅ Implementation plan finalized
  • 🔄 Initial code development in progress