Where your documents go
Tax papers are about as personal as it gets. Here is the whole picture: what we keep, who reads it, where they are, and where we can be wrong.
The short version
- Your files are deleted within 24 hours of you finishing your return.
- Nobody trains an AI model on your documents — not Anthropic, not us. That is in the contract, not just the policy.
- You can export or delete everything at any time, without asking us.
Who touches them, and where
- SupabaseSwitzerland
- Your files and your guide, in the Zurich region. Deleted within 24 hours of you finishing.
- AnthropicUnited States
- Reads your documents, in the United States. Contractually committed not to train on them. May keep the request up to 30 days for safety monitoring, under its commercial terms.
- DatalabUnited States
- Turns scans into text, in the United States.
- VercelEurope
- Runs the website, in the Frankfurt region. Ordinary request logs, no document content.
- StripeIreland / United States
- Takes the payment. Card details go straight to Stripe; we only ever see a payment reference.
Encrypted, but not end to end
Your files are encrypted while they sit in storage, but not end to end. They are readable while the app and the AI read them — that is the only way any AI tool can work with a document — and we hold the keys. Each account's data is kept apart from every other.
A help, not a guarantee
The guidance is specific, line by line. It is not a promise. It can miss a deduction or misread a page. A second pass reads the finished guide back against your papers, and you check every line before you type it. If your year was complicated or a lot of money is at stake, ask a Swiss tax advisor.
What we will not do
- We never send your return. You press submit, in your canton's own app.
- We never sign anything on your behalf.
- We never move money, and we never see your bank login.
- We never speak to the tax office for you.
- We are not tax advisors, and this is not tax advice.
Your rights, and how to reach us
Under Swiss and EU data protection law you can see, export, correct and delete your data. Every return you have open shows what is stored and how to remove it, without asking us. For anything else — an older return, a security concern, a data request — email contact@papertax.ch. The full wording is in the privacy policy.