The SDST is your main point of contact within HM Revenue & Customs (HMRC) during the development and testing of your software product. They will provide the following services to software developers:
You can call the SDST on Tel 01274 539666 between 9.00 am and 5.00 pm, Monday to Friday, or you can contact them by email using the following link
Software Developers Support Team
SDST are also responsible for the issue of the technical information provided to assist in the development of your product.
Currently there are technical specifications and a Local Test Service (LTS) available for both Functional Stages 1 and 2.
The technical packs can be accessed by following the link below.