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Register to vote Register by 18 June to vote in the General Election on 4 July.
If you're a software developer, use the HMRC Developer Hub to learn about and integrate your applications with our RESTful APIs.
Guidance on APIs and how to find commercial software suppliers for different HMRC online services.
When publishing your developer contributions data, follow this guidance on how to format, label and publish the data.
Information and resources for developers about broadband infrastructure and connectivity requirements for new homes.
How to register as a software developer with HMRC.
Support and technical specifications for software developers working with the Charities Online service in making repayment claims.
Find Document Submission Protocol guidance for architects, software developers and other parties interested in building Transaction Engine client applications.
A collection of guides to support the development of combined heat and power (CHP) installations.
Technical specifications for software developers working with the EC Sales List online service.
What you need to do as a developer to meet biodiversity net gain (BNG) requirements.
Reduce development overhead and time to deployment by standardising how teams design, launch and manage APIs in your organisation.
How developers can get advice on Nationally Significant Infrastructure Projects (NSIPs) and applications for planning, permission in principle and technical details consent.
How developers can get their health app assessed and endorsed.
Use of planning obligations and process for changing obligations.
Find technical specifications and schemas for National Export System (NES) XML channel software developers.
List of companies who advised the New Computerised Transit System project team of their intention to develop commercial software solutions for NCTS.
Technical specifications for software developers working with the Agent Authorisation Online service.
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