13th January 2020
The outage for the TTM8.4.0 implementation is expected to begin at 12pm on Wednesday 15th January and complete on Thursday 16th January.
TTM8.4.0, will be an infrastructure update.
Should you have any Trade Test queries or other questions relating to your product development, you can contact the HMRC dedicated Software Developers Support Team mailbox. Queries received through this mailbox are addressed using a triage system to ensure resolution by the Policy, IT and Project Teams.