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Check a list of software developers who can provide Customs Declaration Service software.
Find software developers that can help with entry summary declarations including safety and security declarations for imports.
Information for developing and testing of software for HMRC forms, returns and messages.
Specifications and guidelines for Real Time Information internet submissions and for the outgoing Data Provisioning Service.
Find guidance on PAYE updates for software developers.
Find technical specifications for software developers working with the Corporation Tax online service.
Find Document Submission Protocol guidance for architects, software developers and other parties interested in building Transaction Engine client applications.
Minutes of the Self Assessment software developers forum.
Support and technical specifications for software developers working with the Charities Online service in making repayment claims.
Provides practical advice on making developments better for people and the environment.
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