Guidance

Self Assessment technical specifications for software developers (2020)

Use this guidance for support if you're a software developer working with the Self Assessment Online service.

• From: HM Revenue & Customs
• Published: 19 December 2019

Documents

Transaction Engine: support for software developers

https://www.gov.uk/government/collections/government-gateway-support-for-software-developers

How to use the test service version 1.0 (10 December 2019)

PDF, 177 KB, 7 pages

Non form validation rules version 1.0 (10 December 2019)

PDF, 180 KB, 10 pages

HMRC(IR)mark: support for software developers

https://www.gov.uk/government/collections/hmrcirmark-support-for-software-developers

Acceptable characters version 1.0 (10 December 2019)

PDF, 144 KB, 1 page

Copy declaration version 1.0 (10 December 2019)

PDF, 105 KB, 2 pages

Details

These technical specifications are for software developers working with the Self Assessment Online service.

Published 19 December 2019