Search all content on GOV.UK

Did you mean Software development?

• Basic guide for XML software developers

  Information for developing and testing of software for HMRC forms, returns and messages.

  • Updated: 27 November 2013
• Software developers providing customs declaration software

  Check a list of software developers who can provide Customs Declaration Service software.

  • Updated: 8 December 2025
• Guidelines for using generative artificial intelligence if you’re a software developer

  Find out the expectations for good use of generative artificial intelligence (AI) in commercial software products that help customers submit information to HMRC.

  • Updated: 28 January 2026
• Find commercial software developers

  Use this list to find individual software suppliers and commercial products to use to file online with HMRC online services.

  • Updated: 18 March 2014
• PAYE Online support for software developers

  Technical specifications for software developers working with the PAYE online service.

  • Updated: 1 October 2025
• Software development for HMRC: detailed information

  Guidance on APIs and how to find commercial software suppliers for different HMRC online services.

  • Updated: 5 February 2024
• Software developers providing entry summary declaration support

  Find software developers that can help with entry summary declarations including safety and security declarations for imports.

  • Updated: 16 December 2025
• PAYE updates for software developers

  Find guidance on PAYE updates for software developers.

  • Updated: 25 March 2015
• Real Time Information support for software developers

  Specifications and guidelines for Real Time Information internet submissions and for the outgoing Data Provisioning Service.

  • Updated: 7 August 2025
• Software development: APIs available on the HMRC Developer Hub

  If you're a software developer, use the HMRC Developer Hub to learn about and integrate your applications with our RESTful APIs.

  • Updated: 3 May 2018