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Use this guidance for support if you're a software developer working with the Self Assessment Online service.
Partnership returns technical specifications for Self Assessment Online software developers.
An overview of announcements made by HM Revenue and Customs (HMRC) for Budget 2014.
Trust and estate returns technical specifications for Self Assessment Online software developers.
Use this technical documentation for partnership returns if you’re a software developer working with the Self Assessment Online service
Use this technical documentation for partnership returns if you’re a software developer working with the Self Assessment online service.
Returns technical specifications for Self Assessment Online software developers.
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