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Tax-Fin-LexLegal & Tax Services10 days

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.

Query Response Time
Manual< 5 sec
Questions Answered
0/day200+/day
User Satisfaction
N/A4.6/5
Next.jsOpenAI APIPostgreSQLTailwind CSSVercel

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