Self Assessment technical specifications (2025) for trust and estate returns
Use this technical documentation for trust and estate returns if you鈥檙e a software developer working with the Self Assessment online service.
Documents
Details
Trust and estate returns technical specifications for software developers working with the Self Assessment online service.
Updates to this page
-
The attachments 'Validation Rules for Trust and Estate version 3.0.0a', 'Calculate Tax for Trust and Estate version 3.0.0a' and 'Test Case Generator (Tester) Trust and Estate version 3.0.0' have been added.
-
First published.