New version of Ilmoitin.fi will be launched on 2 June 2026

During the downtime on 2 June 2026 between 7 am and 9 am, the Ilmoitin.fi website and its software interfaces are temporarily unavailable.

Key changes:

• The submission of Tax at source applications enclosure files has been simplified:
  • In the Ilmoitin.fi service, it is no longer required to enter the Application type, Application ID, or Attachment type.
  • Multiple attachments can be submitted at the same time.
  • The file name no longer needs to include the attachment type, and all attachments related to the same Application ID can be combined into a single PDF file.
  • The file name only needs to begin with the Application ID, followed by a unique identifier separated by an underscore.
• FATCA / Rule change:
  • When the value of the AcctNumberType attribute is set to OECD601, Ilmoitin activates IBAN account number validation. In this case, the account number must be in IBAN format. If the attribute is not present or has any other value, validation is not performed.
• CRS/DAC2 / Rule change:
  • The nameType attribute of Name elements may only have the value OECD207.
• In the end of September production release, the Archive functionality will be changed so that submitted files can no longer be opened.