Dealing with HMRC – guidance

Construction Industry Scheme: generic technical specifications

Construction Industry Scheme (CIS) technical specifications for software developers.

Documents

Government Gateway Submission Protocol: 3.1

How to use the test service: 2.3

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Hints and tips on GovTalk and IRheader: 1.2

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Core schema version 2.0

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HMRC(IR)mark

Software developers: frequently asked questions

Detail

Technical specifications for software developers working with the Construction Industry Scheme Online service.