Software development support

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Guidance and regulation

• Choose the right software for Pillar 2 Top-up Taxes
  • Detailed guide
  • 29 April 2026
  • HM Revenue & Customs
• Software developers providing customs declaration software
  • Detailed guide
  • 17 April 2026
  • HM Revenue & Customs
• Guidelines for using generative artificial intelligence if you’re a software developer
  • Detailed guide
  • 28 January 2026
  • HM Revenue & Customs
• Automatic Exchange of Information schema and supporting documents
  • Guidance
  • 24 May 2018
  • HM Revenue & Customs
• Submitting EC Sales List declarations online using CSVs
  • Detailed guide
  • 28 January 2020
  • HM Revenue & Customs

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Organisations

• HM Revenue
  & Customs