Working smarter with the help of language models
Legal prompting course for tax professionals
Various dates throughout the year
Location: The Hague & Online
PE points: 6 | EUR 525,- excluding VAT
About this course
AI sometimes seems like a panacea; the reality is more nuanced. To reap the benefits, you need to master the technology. This course helps tax professionals do just that.
Everyone has heard of ChatGPT, but only one in three professionals actually use it in their daily work. Many lawyers want to use AI, but don't know how to get started or how to use AI effectively. This is where our course comes in.
We take you step-by-step through how to make language models work for you. Whether you are a complete beginner or already experienced, our course is suitable for all levels. Besides a bit of theory, this course is very practical with lots of tips, concrete applications and exercises.
What to expect.
Thorough understanding of how language models work
Concrete applications of language models in your daily practice
Practical skills for writing effective prompts
Learn to create your own AI assistants with custom GPTs
Technology is constantly evolving. For that reason, we update our course weekly based on the latest developments. So the information in our course is always up-to-date, so you are too.
Our instructors are lawyers with a special interest in technology. They will guide you through the ever-expanding landscape of language models. So you'll take full advantage of ChatGPT, Gemini and Claude, for example.
This course is not general in nature: the content is specifically applied to the day-to-day practice of tax professionals. You will learn how to use language models in your work, but also how to critically evaluate the output and avoid pitfalls.
Learn how to make AI work for you so you can focus on what really matters. Enroll in this course now and take an important first step toward a smarter, more efficient and future-proof practice.
Extras
Course participants will receive a prompt guide worth EUR 25. This is an overview of the most useful prompts, which can be used by lawyers in their daily practice.
In addition, participants will also receive prompts to set their custom GPTs.
Program
Part 1: What you need to know before getting started with large language models
To best use ChatGPT or other language models, it is important that you have a good understanding of how the technology works and fundamentals. Before we start discussing practical applications, we will cover the basics of language models. It is important to know and understand these in order to assess the output and avoid misapplication of the tool.
How language models work
Strengths and pitfalls of language models
Overview of available large language models
Phenomenon of hallucination in language models, the reasons behind it and how to prevent it
Data handling within language models
Settings within ChatGPT
Part 2: How to use language models in your practice
This section focuses on the application of language models in the legal profession, understanding different types of models and the role of prompts. We explore practical applications and best practices for effective use. Participants will gain an understanding of the different types of language models, what prompts are, and how they can be used effectively to support and enhance their daily work. We will discuss when and how language models can be useful, the basics of prompting, and the importance of creating clear and focused prompts to achieve desired results.
Applications of language models in legal work
Choosing the right language model for specific tasks
The importance of good prompting
Core principles for effective prompting
Recognizing AI-generated texts
Part 3: Getting started with Legal prompting
Legal prompting is about properly instructing a language model. A good and clear prompt is essential to get good and useful output from a language model. In this section, participants learn how to use clear instructions to obtain the desired output from a language model.
Basic principles of legal prompt writing
Key elements of prompts
Different ways of prompting
Examples of effective prompts
Adapting prompts to desired styles and goals
Part 4: Examples of prompts
Based on the background of the participants, their needs and questions, we will discuss for them concrete and useful example prompts that can help them in their daily work. Consider prompts for:
Summarizing case law
Legal research
Writing blogs
Drafting mails
Comparing documents
Translations
Part 5: Advanced functionalities of language models
Under the hood of language models there are several useful functionalities built in, but not everybody uses them yet. During this session, we ensure that participants have the right knowledge and techniques to use the more advanced functionalities of language models. You will learn how to get the most out of language models. Among other things, we will discuss:
Creating images
Document Analysis
Data analysis
Converting speech to text
Extracting text from images
Part 6: Building your own custom GPT
Custom GPTs are a powerful feature within ChatGPT that allows users to customize the AI assistant to their specific needs and preferences. Instead of relying solely on ChatGPT's default settings, custom GPTs allow you to create your own personalized AI assistants that specialize in certain topics, writing styles and/or tasks from your daily work. This opens up a world of possibilities for improving your productivity.
Based on the background of the participants, we build a custom GPT during the course day. Participants receive the steps and text for this afterwards, so that they can continue this at home and possibly build several GPTs of their own.
Teacher
Thierry Boonstra
Director – Forvis Mazars
Thierry Boonstra is a tax lawyer at Forvis Mazars, specializing in International Tax, M&A Tax and Tax & Data Analytics. Since 2012 he advises (inter)national companies on cross-border tax structures, mergers and acquisitions, and the smart use of data within the tax domain. In addition to his advisory practice, Thierry is active as an ambassador for the Mazars Foundation.
Practical information
Dates & times: See below.
Location: Our regular course location in The Hague (Koninginnegracht 60).
Cost: EUR 525 excluding 21% VAT.
PO/PE credits: 6 (non-legal)
This course is held physically only.
Dates & Registration
Tuesday, September 23, 2025
10 a.m.-4 p.m.
Thursday, October 30, 2025
10 a.m.-4 p.m.
Tuesday, December 16, 2025
10 a.m.-4 p.m.
Tuesday, January 27, 2026
10 a.m.-4 p.m.
Friday, March 6, 2026
10 a.m.-4 p.m.
Thursday, April 16, 2026
10 a.m.-4 p.m.
Insights
Question or comment?
Do you have a question about this course? Let us know!
Please fill out the contact form. You will receive a response within 2 business days.
Of course, you can always call or email us:
E-mail: info@theinnovativelawyer.ai
Phone number: 070-450 09 74
Do you have a complaint? That is very annoying, but we still like to hear it. Please pass it on to us via the complaint form.
Why choose us?
Legal content &
Technological knowledge
We combine legal expertise with technological knowledge. As a result, we know what kind of problems lawyers face and what solutions may or may not fit. Precisely this combination enables us to help you further.
Practical &
Accessible
Our approach is hands-on and our knowledge directly applicable, with the goal of making AI accessible, understandable and usable for any legal professional, regardless of your knowledge level or experience, so you can work with AI with confidence.
Committed &
Flexible
We are fully committed to your success and tailor our services to your unique needs, with personal attention, customized solutions and a flexible approach always focused on getting the best results.
Continuous Learning &
Development
We believe in continuous growth and improvement by learning, innovating and adapting to a changing world. We think and move with you and your daily practice. For new challenges, we find new solutions.