How to grant an authorisation for tax matters

You can authorise an agent to take care of your personal tax matters or your company’s taxes on your behalf. Your agent can be another person or a company, such as an accounting firm.

You can grant an authorisation on Suomi.fi. Companies can also keep using Katso authorisation in 2020. However, please note that old Katso authorisations are not automatically replaced with new Suomi.fi authorisations.

Check the table to see which authorisations can be used in which service channels

Suomi.fi authorisations for all tax matters

There are several different authorisations for tax affairs:

An authorised agent can take care of all the tax matters of the person or company who has granted the authorisation. The agent can also access tax data in MyTax. For example, an accountant can be authorised to manage all the tax matters of a company.

The authorised agent can visit tax offices and call our telephone service as well as use MyTax, Ilmoitin.fi, Lomake.fi and any future e-services on the authorising party’s behalf. However, the authorisation does not allow the agent to use Palkka.fi or to submit reports to the Incomes Register. The Incomes Register requires separate authorisation.

The “Managing tax matters” authorisation can be used by

  • individual taxpayers
  • self-employed individuals
  • general and limited partnerships
  • limited companies, housing companies and cooperatives.

How to grant an authorisation – see instructions for your situation

Agents can see the personal tax data of self-employed individuals

If you grant the “Managing tax matters” authorisation to an accounting firm, the firm can see your personal tax details as well as your company’s details in MyTax.

The agent can access the following details in MyTax:

  • income tax, inheritance tax, gift tax
  • advance rulings, claims for adjustment and decisions relating to income tax
  • decisions on claims for adjustment made by the Tax Administration and the Adjustment Board
  • letters and decisions concerning taxation
  • tax audit reports concerning business operations
  • decisions on advance rulings made in MyTax.

Inside information according to the EU regulation on market abuse is not available in MyTax. 

Suomi.fi authorisation for individual tax matters

The agent can view and update the real estate details used as basis for the authorising party’s real estate taxation. The agent can also request extended time for filing a real estate tax return and file a claim for adjustment of real estate tax.

Authorisations that have been granted after 1 October can be allocated to individual accountants or the like. The authorisation can be used in MyTax as of November 2019.

How to grant an authorisation – see instructions for your situation

This authorisation allows the agent to file tax returns and other tax-related reports on behalf of the authorising party.

The agent can use Lomake.fi and Ilmoitin.fi to file tax returns.

However, this authorisation does not allow the agent to use MyTax and access the authorising party’s tax data there.

How to grant an authorisation – see instructions for your situation

The agent can submit and edit requests for VAT refunds to other EU countries on the behalf of the authorising party as well as view the messages they receive on the subject.

Authorisations that have been granted after 1 October can be allocated to individual accountants or the like. The authorisation can be used in MyTax as of November 2019.

How to grant an authorisation – see instructions for your situation

This authorisation allows the agent 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.

Authorisations that have been granted after 1 October can be allocated to individual accountants or the like. The authorisation can be used in MyTax as of November 2019.

How to grant an authorisation – see instructions for your situation

This authorisation allows the agent to

  • request registration for the VAT special scheme
  • take care of tax matters related to the VAT special scheme.

Authorisations that have been granted after 1 October can be allocated to individual accountants or the like.The authorisation can be used in MyTax as of November 2019.

How to grant an authorisation – see instructions for your situation

How to grant an authorisation

See below for more detailed instructions specific to different company types.

You can authorise another person or company to take care of your tax matters on your behalf. You can grant the authorisation on Suomi.fi. Select the authorisation you wish to grant in the Suomi.fi Authorizations service.

Please note: After you have granted the “Managing tax matters” authorisation, your agent can see, edit and file all your tax data in all Tax Administration service channels (MyTax, tax offices, telephone service). The agent can also change your bank account number in MyTax.

Managing the tax matters of an underaged child

If you have an underaged child, you are automatically authorised to take care of their tax matters in MyTax without an authorisation. The e-authorisation service checks the Population Information System to see if you have a guardian’s right to manage the child’s tax matters.

Authorisation granted in writing

If you have been granted a power of attorney on paper that authorises you to take care of another person’s taxes, you can ask an official at a tax office to create an authorisation for you on Suomi.fi during the remainder of 2020. Present your power of attorney at the tax office. After this, you can use the MyTax e-service to take care of the other person’s taxes.

An agent can manage your tax matters on your behalf if you grant them the necessary authorisation.

Please note:

  • After the authorisation has been granted, the authorised agent can see, edit and file all of the authorising party’s tax details relating to their business operations and personal taxation. If you do not want your accountant or agent to see your personal tax data, do this:
    • Grant the “Filing tax returns” authorisation to your accountant on Suomi.fi. This authorisation allows the agent to file all necessary tax returns on your behalf.
    • Log in to MyTax with your personal e-bank codes, copy all the necessary details, and send them to your accountant.
  • Authorisation with a Business ID or personal ID: We recommend that authorisations are granted with a Business ID. If you grant an authorisation with your personal ID, the agent cannot see your data on the list of taxpayers in MyTax and they will not receive the monthly summary.

A self-employed individual can grant authorisations on Suomi.fi even if they are not in the Trade Register.

If you take care of your company’s taxes and you have an official role recorded in the Trade Register, you can manage your company’s tax matters without authorisation. You can log in to the Tax Administration’s e-services with your personal e-bank codes.

If you want to authorise an agent to manage your company’s taxes, do this:

If you continue using Katso authorisation

Even though Katso authorisations will remain in use in 2020, we advise you to take Suomi.fi authorisations into use as soon as possible. Note that you will only be able to use the following Katso roles:

  • Company’s Master User
  • Company’s Parallel Master User
  • Company MyTax

The following Katso roles have already been discontinued:

  • Company's income tax returns
  • Filer of self-assessed taxes.

More information about Katso authorisations

Agents authorised to manage the tax matters of any of these parties must use Katso identifiers and Katso authorisations in Tax Administration service channels for the time being. Suomi.fi authorisations cannot be used for these tax matters.

Please note that the Katso roles “Company’s income tax returns” and “Filer of self-assessed taxes” can no longer be used to access MyTax as of 1 November 2018. Only the following Katso roles can access MyTax:

  • Company’s Master User
  • Company’s Parallel Master User
  • Company MyTax

Read more about Katso

Detailed instructions for granting authorisations on Suomi.fi

Company – you can find the following instructions on Suomi.fi:

  • How to grant an authorisation to another company
  • How to authorise another company to act on your company’s behalf
  • How to authorise an employee to act according to an authorisation granted to the company
  • How to authorise an employee to manage the authorisations granted to the company
  • How to accept a request for authorisation

Instructions for companies granting authorisations on Suomi.fi

Individual – you can find the following instructions on Suomi.fi:

  • How to authorise another individual to act on your behalf
  • How to accept a request for authorisation

Instructions for individuals granting authorisations on Suomi.fi

Frequently asked questions

The following parties can use all Tax Administration services on the company’s behalf:

  • Managing Director or substitute for the Managing Director
  • Chairman of the Board
  • liquidator
  • Building Manager
  • entrepreneur (no listing in Trade Register required)
  • general partner or partner
  • party authorised to sign for the company alone
  • holder of procuration.

The following parties can grant authorisations on the behalf of the company:

  • Managing Director
  • entrepreneur
  • party authorised to sign for the company alone
  • individual who has been granted the right to do so on Suomi.fi by the above party.

Two together signing for the company: At present, Suomi.fi authorisations are not available for companies where two together are authorised to sign for the company. However, authorisations will soon be available for use in situations where two or more people must sign together.

One person’s limited company: You can grant an authorisation to your accountant on Suomi.fi. You can also manage your company’s tax matters yourself by logging in to MyTax with your personal identifier.

You must request a Katso authorisation from your new clients regardless of their company type. Direct access to Tax Administration services through Tyvi service channels still requires Katso authorisation. This will change in 2020. More details on the schedule will be published during 2020.

Suomi.fi authorisations are only accepted in situations where the accounting firm does not have direct access to the Tax Administration from software, but instead uses MyTax for filing tax returns or uses Ilmoitin.fi to upload files generated by their accounting software.

If you are a private guardian, at present you cannot use MyTax on the behalf of the individual under your guardianship unless they can use electronic identification and grant you the authorisation to do so. Suomi.fi does not currently allow authorisation without electronic identification.

When Suomi.fi enables guardians to use the service on the behalf of the individuals under their guardianship, guardians will also be able to use MyTax.

More information on when authorisations can and cannot be used on Suomi.fi