SolvedCTM95430 | CTSA: Revenue determination: Negative amounts
From HM Revenue & Customs · Company Taxation Manual
FA98/SCH18/PARA3
Under CTSA you do not make CT determinations of trade losses and other amounts relievable as group relief. The company must include the relevant figures in its company tax return and those figures become final with the return.
In addition to trade losses and other amounts that can be surrendered as group relief, the CTSA rules cover any other negative amounts shown in the return, for example:
allowable losses under TCGA92/S16,