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Information for developing and testing of software for HMRC forms, returns and messages.
How to access the transport users benefit appraisal (TUBA) software to undertake economic appraisal of transport schemes.
Check a list of software developers who can provide Customs Declaration Service and Customs Handling of Import and Export Freight (CHIEF) software.
This guidance is an introduction to the Open Document Format (ODF) standard and how you can select ODF-compliant solutions.
Find Companies House-recognised filing software to manage your company accounts, returns and tax accounts
Use this list to find individual software suppliers and commercial products to use to file online with HMRC online services.
How to choose data tools and infrastructure that are flexible, scalable, sustainable and secure.
Specifications and guidelines for Real Time Information internet submissions and for the outgoing Data Provisioning Service.
How to send information to Companies House using third party software or by developing your own software.
Don’t include personal or financial information like your National Insurance number or credit card details.
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