User's guide for the Katso system
Go to Precise information Katso - detailed instructions to look for detailed instructions (including Katso ID setup, passwords, authorizations, using e-services for the first time) for Katso users.
Katso instructions for the following taxpayer groups
- Companies and organisations: Instructions to corporate taxpayers using Katso Identification System
- Estates of deceased persons, tax consortia: Instructions, Katso representation of an estate or consortium
- Agents: Katso instructions for agents
- Grantors of authorization: Katso instructions for authorizing another party (usually an accounting firm).
The Katso ID gives you access to e-filing and e-services. For a complete list of available services go to List of available e-services.
The URL of Katso is yritys.tunnistus.fi.