Opti.Tax documentation: the superior software solution on the market
Opti.Tax for procedural documentation
Only Opti.Tax offers the complete package for your practice:
- Visualisation as a BPMN diagram AND as a text document
- Links, attachments and references of all kinds
- AI-assisted generation of sample process chains and texts
- technical leadership, all key interfaces, and much more.
Watch the video to see how Opti.Tax takes the creation and maintenance of your procedural documentation to a whole new level.
We have been developing compliance and reporting solutions for professionals for decades.
The software uses the BZSt taxonomy, so you won’t miss a thing.
We keep the software up to date with free updates.
Using Opti.Tax to create dynamic procedural documentation
Software that provides you with active support
Create an AI-supported process chain
An easy way to get started with your first workflow: use the AI assistant to generate a template that you can customise – or start from scratch and begin writing straight away. To use the AI assistant, all you need is a paid ChatGPT key. Everything else is already integrated into Opti.Tax.
Apply the generated process chain with a single click
Once the AI assistant has created the process chain according to your specifications, you can import it into your project with a single click. You can then edit and customise every detail of the process chain.
Assign responsibilities and view them as swimlanes
Assign responsible persons to the individual process steps. When you regenerate the BPMN diagram, the processes will be displayed as swimlanes in accordance with your assignments.
Practical example: Law firm and client
Collaborative documentation without media breaks

The software solution for GoBD-compliant procedural and process documentation
Why process documentation with Opti.Tax makes all the difference
With the Opti.Tax process documentation software and hsp’s outstanding service, you gain access to a wealth of features and support to help you create comprehensive, legally compliant and up-to-date documentation, step by step.
Developed for you in Hamburg
Why so many professionals put their trust in hsp
FAQ – Frequently Asked Questions
Frequently Asked Questions about the Opti.Tax procedural documentation software
Opti.Tax is a powerful tool for creating and maintaining procedural documentation. We have answered some of the most frequently asked questions about it for you.
If you have any further questions, please do not hesitate to get in touch. We look forward to hearing from you.
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About hsp – Software innovation made in Germany
Since 1991, hsp Handels-Software-Partner GmbH has been developing professional software solutions for tax consultancy and audit firms, as well as for businesses.
Our taxonomy software Opti.Tax has established itself amongst discerning professionals in the DACH region as the reliable, high-performance and long-term solution for electronic invoicing. The digital tools for legally required, GoBD-compliant documentation are particularly popular.
Practical relevance, up-to-date content and genuine service
Our software modules are developed in close collaboration with experienced partner firms such as Energiesozietät GmbH for internal control systems (IKS), ADKL Abels Decker Kuhfuß & Partner mbB for transfer pricing, and Schröder & Partner for the digital pension file. In this way, we ensure that the features in Opti.Tax are tailored to the real-world challenges of day-to-day professional practice.
Regular updates ensure that changes to legislation and new requirements are incorporated into the software in a timely manner. In addition, we support you with a comprehensive range of service and support offerings, e-learning courses, access to the hsp Community, our weekly live broadcast „hsp live at 11“ and much more.





























