News for software developers - 5/2025

Downtime in MyTax in November

We have a service break in MyTax in November due to an annual system update. The service break will start on Friday 14 November at 5 pm (no log-in after 4.30 pm) and end on Tuesday 18 November at 8 am.

On Monday 17 November, we have limited service and can give only general guidance. A longer downtime is necessary to implement the system changes required by upcoming changes in corporate taxpayers’ tax payments.

IT developers, note the following effects of the November downtime:

• Vero APIs will be unavailable between Friday 14 November 10 pm and Sunday 16 November 5 pm.
• Ilmoitin.fi and returns from taxpayers’ systems through service providers: returns can be submitted normally during the service. Note, however, that:
  • they will not be processed at the Tax Administration until after the break
  • their received date is the same as the send date.

Read more:

• Maintenance breaks and disruptions affecting the Tax Administration’s services
• Information about upcoming changes in taxation: vero.fi/changes

Software developers – events

“Clinics” on Teams (in Finnish)

For 2025, there is an updated schedule for upcoming events on Teams, which you can find on Tilaisuudet - vero.fi on our website.

Our “clinic” style events will offer IT developers a wide variety of information updates. If you have questions or suggestions for issues to be discussed at the next “clinic”, you are welcome to send e-mail to ohjelmistotalot(at)vero.fi – for subject, write: Klinikka.

The Tax Administration and software developers collaboration day online (in Finnish)

The Tax Administration and software developers autumn collaboration day online on November 25, 2025. The day will start at 9:00 AM.

You can now view the event schedule and register. The link to the schedule and registration can be found below.

Register for the day (in Finnish)

How to contact us or make enquiries

ohjelmistotalot(at)vero.fi

You can use the e-mail address of the Tax Administration (for software houses) to ask questions related to the Incomes Register as well. We forward the questions to the Incomes Register Unit. However, we remind all users that our e-mail is:

• Intended for those who work with IT development at commercial software vendor companies
• Designed to give guidance and support to IT development
• Not at all for error processing
• Instead, if you detect an error or become aware of a technical problem, always use the observation form to inform the Incomes Register Unit of it.