Meet the people building PaperTax
Amir Mohammadi and Juan Pablo Zuluaga, in Zürich. When you write to us, one of the two of us answers.
Where this started
In spring 2026 one of us sat down to file a 2025 return. A Treuhänder (accountant) had already prepared it, and we wanted to check the numbers before signing, so we put together a rough tool that read the documents and listed what belonged in each field.
It found a health insurance certificate from the wrong year. The accountant had already used it.
Since then, we have been developing PaperTax so other people can use it to understand their documents and prepare their own tax returns.
What PaperTax does
PaperTax is software that reads your uploaded documents and builds instructions for your canton’s official tax app. You can ask the AI questions about those instructions and your situation. We do not prepare or submit a return on your behalf, and we are not tax advisors.
For a complicated tax situation or professional advice, contact a qualified Swiss tax advisor.
What you can expect from PaperTax
- You review and submit your return
- The guide explains which values to enter and where to enter them. You check those values against your documents, fill in the cantonal app and submit the return yourself.
- One payment, no subscription
- CHF 59.90 covers the guide and chat for one tax year in one canton. There is no subscription. A return for another tax year requires a separate payment.
- How we handle your documents
- Your files and guide are stored in Switzerland. PaperTax deletes its stored data within 24 hours after you mark the return as done, or after two years of inactivity. Your documents are not used to train AI models. The trust page explains processing locations and the different retention rules of our service providers.
- Why you need to check the guide
- The AI can misread a document or miss a deduction. An additional check compares the guide with your documents, but it can still miss errors. Review each entry before submitting your return.
Reaching us
Email contact@papertax.ch with questions, feedback or a problem you need help with. You can also join our Discord community. Please upload tax documents in the app rather than sending them by email or posting them publicly.