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Support Digital Messaging (SDM)
For software developers and data providers
About us
Welcome to the website Support Digital Messaging (SDM) of The Netherlands Tax and Customs Administration.
List of topics
List of message flows per topic.
Test facilities for software developers
There are various test facilities available for software developers.
Register or Subscribe?
Are you going to develop software for one or more topics? Then apply for a support subscription here. After approval of your application, we will send you a confirmation via email. This will give you access to the SDM website, the Validation Test Service and the SDM service desk. You will also receive news reports on selected topics with information on new developments and new specifications and documentation.
Are you not a software developer, but you want to stay informed about developments on these topics? Then request a news subscription here.
Topics
Service messages
- 11-03-2026 09:04 Progress Migration Digipoort (WUS)
- 04-03-2026 12:44 Progress Migration Digipoort (WUS)
- 04-03-2026 11:16 Reminder for the migration to the new Digipoort FTP
- 22-01-2026 17:56 Updated information about the migration to the new Digipoort
- 09-07-2025 17:11 Digipoort Migration - Information for WUS users