If you are producing the accounts in Absolute and are using some of the losses brought forward against this year's profits then you would post a journal in the accounts.

You would debit code 9401 with the value of the losses being used and credit code 9999.

When you go from accounts through to tax you will get the adjusted profit screen which will be populated with the losses brought forward being used and this will populate through to the tax form.

For the purposes of the memorandum to the CT computation you need to go to Tools / CT / losses to enter the total value of losses brought forward.