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End of tax year We’re sending income tax assessments out from late-May until the end of July. If you have a tax bill you may be eligible for an automatic write off. Find out more

View and download the payday filing software developer kits to help you build. 

They contain:

  • sample messages for each service operation - requests and responses
  • the schema (XSD) and supporting WSDL for each service
  • test scenarios and data for our mock services (sandbox) and integrated test environments.

Employment information (EI) software developer kit

This SDK also contains the EI return service build pack with OAuth authentication details, data definitions and response status codes.

Employment information (EI) returns software developer kit (SDK)

Employee details software developer kit

This SDK also contains the employment service build pack with OAuth authentication details, data definitions and response status codes.

Employee details (ED) software developer kit (SDK)

Supporting guides and services

Use the Getting started guide to find out how to access our sandbox (mock services) and test environments.

Getting started guide

Identity and access service