How we handle your documents and data
Your tax documents and guide are stored in Switzerland and encrypted. Some processing takes place outside Switzerland. We use the services listed below to read your documents, build your guide and run the app.
Your documents in PaperTax
- PaperTax deletes its stored documents and guide 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. Each service provider has its own retention rules, described below.
- You can delete a return from your dashboard. For a copy of your personal data or help with a data request, contact us using the details below.
Which companies process your data
- SupabaseSwitzerland
- Stores your files and guide in Zurich. PaperTax deletes this data within 24 hours after you mark the return as done, or after two years of inactivity.
- MicrosoftUnited States
- Reads your documents in the United States. Your documents are not kept after they are read and are not used to train AI models.
- AnthropicUnited States
- Builds your guide from what was read in your documents and answers your questions, in the United States. Your data is not used to train its models. Standard API requests may be kept for up to 30 days for safety monitoring. The agent that builds your guide also uses stored copies of files and conversations. These remain until deleted.
- StripeIreland / United States
- Processes your card payment. You enter your payment details on Stripe’s checkout page. PaperTax receives a payment reference and status, without your full card number.
How encryption protects your files
Your files are encrypted while stored and while being sent between your browser and our services. PaperTax and its processing providers can read the contents when building your guide, so this is not end-to-end encryption. PaperTax manages the encryption keys. Access controls keep each account’s data separate.
What you need to check
Use the guide alongside your documents and check the values and instructions before submitting. The AI can misread a document, miss a deduction or give an incorrect instruction. An additional check compares the guide with your documents, but it can still miss errors. For a complicated situation or a decision involving a large amount of money, ask a qualified Swiss tax advisor.
What PaperTax does not handle
- You review, sign and submit the return in your canton’s own app.
- PaperTax does not move money for you or receive your bank login details.
- You communicate with the tax office yourself. PaperTax does not represent you.
- We are not tax advisors. The app provides software guidance, not professional tax advice.
Access, correct or delete your data
You can delete a return from your dashboard. If the full guide is unlocked, you can also download your uploaded documents and export the guide data as a file. Keep a copy of anything you want to retain before deleting the return.
To ask for a copy of your personal data, request a correction or deletion, or report a security concern, email contact@papertax.ch. You can also write to us if you need help using the dashboard controls. The privacy policy explains your rights under Swiss and applicable EU data protection law, including the records we must retain.