Tax-Fin-Lex - TFL AI Chat Application MVP
Building an AI-powered legal assistant that answers tax and law questions using Tax-Fin-Lex's extensive knowledge base.
The Challenge
Tax-Fin-Lex is Slovenia's leading legal and tax information platform with thousands of articles, laws, and regulations. Their users — lawyers, accountants, and tax advisors — frequently needed quick answers to complex legal questions.
The problem? Finding specific information across 10,000+ documents was time-consuming. Users had to manually search, read multiple articles, and piece together answers. Tax-Fin-Lex wanted to leverage AI to make their knowledge base instantly accessible.
Key problems:
- Users spending hours researching answers that exist in the knowledge base
- Complex legal questions requiring cross-referencing multiple sources
- Growing demand for instant answers in the age of ChatGPT
- Need to differentiate from generic AI tools with verified legal content
Our Approach
Day 1-2: Discovery
We analyzed how legal professionals ask questions. Unlike casual users, they need precise citations, sources, and confidence levels. A generic chatbot wouldn't cut it.
We mapped out the ideal conversation flow: question → AI analysis → answer with cited sources → follow-up questions.
Day 3-4: Architecture
We designed a Retrieval-Augmented Generation (RAG) system:
- Vector embeddings of all Tax-Fin-Lex content
- Semantic search to find relevant documents
- GPT-4 for answer synthesis
- Source attribution for every claim
The UI was designed for professional use — clean, focused, with easy citation copying.
Day 5-7: Development
Built the AI chat application:
- Custom prompt engineering for legal accuracy
- Chunked document processing for better context
- Streaming responses for perceived speed
- Conversation history for follow-up questions
- Admin dashboard for monitoring and quality control
Day 8-9: Polish
Extensive testing with real legal queries. We tuned the retrieval system to prioritize recent legislation, improved source formatting, and added confidence indicators.
Day 10: Launch
Deployed to production with usage limits and monitoring. The TFL AI Chat went live as a premium feature for subscribers.
The Results
The TFL AI Chat transformed how professionals access legal information:
- Instant answers — from hours of research to 5-second AI responses
- 200+ questions answered daily — immediate adoption by power users
- 4.6/5 satisfaction rating — users trust the cited sources
Client Testimonial
"Working with GALOR on Tax-Fin-Lex was a great experience. They delivered quality work on time and were always responsive to our feedback." — Zlata Tavčar, Owner & CEO, Tax-Fin-Lex
Key Takeaways
- RAG beats fine-tuning for knowledge bases — retrieval ensures accurate, up-to-date answers
- Citations build trust — showing sources is essential for professional users
- AI is a feature, not a product — integrating with existing content made it instantly valuable