Terminal Loss

Hi, I have a trading company and the year end of the company is Feb. Last set of accounts are prepared for 1 Mar 24 to 30 Sep 24 and the company year end is shortned from Feb 25 to Sep 24, I have made a loss of £40,000 in last set of accounts. I wanted to know how far can I claim terminal loss reliefe? How do I apportion the profit? FYI - taxable profits were Y.e 28 Feb 21 £21860 Y.e 28 Feb 22 £8300 Y.e 28 Feb 23 £346 Y.e 28 Feb 24 £729

Hi,
Terminal losses can be carried back up to 3 years before the period the losses incurred in. 
If your losses incurred in the period 1 March 2024 to 30 September 2024. you may use the terminal losses against any profits incurred between 1 March 2021 to 29 February 2024. 
You only need to apportion the profit if a period partially falls within the 3 years and the rest is outside of it. So, if a third falls inside of the 3 years and two thirds do nt,t then you apportion to a third of your profit.
We are unable to help you with the specific calculation as Corporation Tax is self assessed. You can see guidance and examples on how to apportion here:
CTM04130 - Corporation tax: trading losses: general: relief for losses carried forward: losses incurred from 1 April 2017: terminal losses
Thank you.