How to log in to MyTax and other e-services

Katso IDs will be taken out of use

You can no longer use your Katso ID starting 1 January 2021. Log in to the e-services with your personal e-bank codes, a mobile certificate or a certificate card. The mobile certificate or certificate card can also be provided to you by an organisation.

You must log in to be able to take care of your or your company’s tax matters in our e-services. Log in to MyTax or our other e-services with your e-bank codes, a mobile certificate, an electronic ID card or a Katso ID.

If you use the service on behalf of someone else, you will need a Suomi.fi authorisation.

Foreign companies can still use Katso IDs and Katso authorisations until autumn 2020. However, they can already start using a new means of identification and Suomi.fi authorisation for acting on behalf of a company.

Log in with e-bank codes, ID card or mobile certificate

When you take care of your own or your company’s tax matters, you can log in with your online banking codes, electronic ID card or mobile certificate, if you are:

  • a private individual
  • a business owner, self-employed
  • an operator of a farm or forestry enterprise
  • the representative of a limited liability company, housing company, cooperative society, general partnership, limited partnership or association, if you have an authorisation recorded in the Trade Register that entitles you to use MyTax on their behalf.

You can log in with your online banking codes, electronic ID card or mobile certificate, if you are managing the tax matters of another company or organisation and you have been granted a Suomi.fi authorisation by any of the following:

  • companies (limited companies, housing companies and real estate companies)
  • foundations and associations
  • public organisations (such as municipalities and parishes)
  • partnerships (such as agricultural, forestry and business partnerships)
  • estates with a Business ID
  • benefits under joint administration.

Katso identification

The following taxpayer groups can log in with a Katso ID until 31 December 2020:

  • companies (limited liability companies, housing companies and real estate holding companies)
  • foundations and associations
  • public organisations (such as municipalities and parishes)
  • partnerships (such as agricultural, forestry and business partnerships)
  • estates with a Business ID
  • joint-benefit administrations
  • foreign citizens and companies.

One authentication for multiple services

MyTax uses the Suomi.fi authentication service. It enables single sign-in to all the e-services of public organisations in which the authentication service is in use. For example, you can move from MyTax directly to Suomi.fi Messages without having to log in again.

Identification without Finnish ID - eIDAS identification for EU citizens

Some EU citizens can use their home country's national identification methods to access Tax Administration services through eIDAS identification.

Finnish Authenticator for acting on behalf of a foreign company

If a foreign company’s representative does not have a Finnish personal ID, they can start using the Finnish Authenticator service and request a Suomi.fi authorisation to act on behalf of the company.

Finnish Authenticator and Suomi.fi authorisations are already available, but you cannot use them in MyTax or other Tax Administration e-services until the autumn of 2020.

Read more: Foreign individuals: How to grant an authorisation for tax matters

Frequently asked questions

To get online banking codes you must sign an agreement with your bank. Note that only personal online banking codes enable you to log in to our e-services.

A mobile certificate is an identifier in your mobile phone’s SIM card. 

If the mobile certificate is in an employee’s business phone, it is not regarded as taxable income for the employee. If the certificate is in the employee’s private phone and is used for business purposes, the employer must give the employee a tax-exempt reimbursement for the expense against a receipt.

Read more about the mobile certificate at mobiilivarmenne.fi

A certificate card is an ID card containing a citizen certificate or an organisation card containing an organisation certificate. ID cards are issued by the police, whereas organisation cards are issued by the Digital and Population Data Services Agency. 

If the employer acquires an ID card for an employee, the card is regarded as taxable earned income for the employee. An organisation card, on the other hand, is not regarded as taxable income. If the employer has bought a card reader and it will remain in the employer’s use, the reader is not regarded as a taxable benefit for the employee.

Read more about certificate cards on the Digital and Population Data Services Agencys website: Certificates and cards for organisations