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Information for developing and testing of software for HMRC forms, returns and messages.
How to choose data tools and infrastructure that are flexible, scalable, sustainable and secure.
Technical specifications for developing software to send information to Companies House digitally.
This guidance is an introduction to the Open Document Format (ODF) standard and how you can select ODF-compliant solutions.
Make sure your technology, infrastructure and systems are accessible and inclusive for all users.
Find HMRC-recognised payroll software to manage your Real Time Information (RTI) PAYE payments and deductions.
Use this page to check which software works with Making Tax Digital for Income Tax.
Publish your code and use open source to improve transparency, flexibility and accountability.
How to send information to Companies House through our extensible markup language (XML) schemas, by purchasing software or developing your own.
Find Companies House-recognised filing software to manage your company accounts, returns and tax accounts
The UK government's design principles and examples of how they've been used.
How to manage configuration: open source tools, writing infrastructure in code, portability.
Follow this guidance if you’re responsible for choosing, buying and managing Software as a Service (SaaS) tools in your organisation.
Design, build and operate APIs in a consistent way
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