HMRC has announced that it is starting the phasing in of the new Customs Declaration Service, which will replace the 30-year-old CHIEF system. CHIEF will close for import declarations on September 30th and for export declarations in March 2023.
HMRC has just written to firms about the change. The letter is the first listed here: https://www.gov.uk/government/publications/letters-to-businesses-about-importing-and-exporting-goods-between-great-britain-and-the-eu?utm_medium=email&utm_campaign=govuk-notifications-topic&utm_source=3e0dab73-23fd-4293-b67d-6d88aa71dbcc&utm_content=daily