Hi Tina,
You should write to HMRC to confirm the date your company ceased trading. The address to send this to is :- Corporation Tax Services, HM Revenue and Customs, BX9 1AX. You can use HMRC's free Corporation Tax online filing service provided your company meets the criteria for using this service. More information on who can use the service can be found at
Check if you can use the HMRC Corporation Tax online filing service.You should note that this service does not allow you to prepare your accounts and you will require a balanced set of company accounts to the date of cessation to allow you to use this service. Filing your company tax return online is mandatory and you cannot send it to HMRC by post.
Thank you.