CTSA: Revenue determination: CTPF: finality
A loss determination for a period that turns out not to be an accounting period is invalid. There is no provision equivalent to the provision in ICTA88/S12 (8) for assessments that would enable you to correct the notice.
TMA70/S41C provides a normal time limit for determinations of six years from the end of the accounting period to which the determined amount relates.
A determination of trading losses or other determinable amounts need not exist before a company can make a claim in respect of a related trading loss. Time limits for claims by a company are governed by the rules of the particular relief concerned, or otherwise byTMA70/S43 (1).
The time limit for determinations is to protect companies against unreasonably late assessments. Bear in mind that you can make an assessment within one year of a determination giving rise to an adjustment to group relief under FA90/S96 (CTM97980).
For guidance on the conclusiveness of CT directions in relation to loss determinations see CTM95590.