Katso identification – electronic identification and authorisation system for companies

You can use a Katso ID to log in to various official e-services, such as MyTax, as a company representative.

Katso IDs can be used by companies, partnerships, estates and public organisations, such as municipalities.

Go to the Katso service

Katso roles and authorisations in MyTax

This role is intended for an employee or an accountant that manages the tax matters of a business operator, a self-employed individual, an agricultural operator or a forestry operator. The role allows you to view, correct or submit information both on the company’s business operations and on the authorising party’s personal tax matters.

If you are managing affairs on behalf of a self-employed individual, you can use all MyTax features and read all the information available there.

For example, you can

  • request a tax card or prepayments
  • submit bank account numbers
  • file tax returns.

This role is for a person who has the right to sign for the company. If you are managing affairs on behalf of a corporation, you can use all MyTax features, view all the information available in MyTax and submit a new or changed bank account number.

You can read letters published in MyTax about taxpayer registration, tax audits and payments. You can also receive emails whenever there are notes and reminders about overdue payments or about new messages and letters in MyTax.

This role is for a person who manages authorisations in the Katso service in addition to the Master User.

If you are managing affairs on behalf of a corporation, you can use all MyTax features, view all the information available in MyTax and submit a new or changed bank account number.
You can read letters published in MyTax about taxpayer registration, tax audits and payments. You can also receive emails whenever there are notes and reminders about overdue payments or about new messages and letters in MyTax.

This role is for an employee or an accountant who manages the company’s tax affairs.

If you are managing affairs on behalf of a corporation, you can use all MyTax features, view all the information available in MyTax and submit a new or changed bank account number.

You can read letters published in MyTax about taxpayer registration, tax audits and payments. You can also receive emails whenever there are notes and reminders about overdue payments or about new messages and letters in MyTax.

This authorisation allows the representative to

  • make, edit and submit requests for VAT refunds to other EU countries and view the messages received on the subject
  • request registration for the VAT special scheme
  • take care of tax matters related to the VAT special scheme.

This authorisation allows the representative to

  • view and update real estate details used as basis for real estate taxation
  • request extended time for filing a real estate tax return
  • submit claims for adjustment of real estate tax.

This authorisation allows the representative to

  • file, view and edit household’s reports on construction work as well as contract and employee details related to construction
  • request tax number details.