Tax_returner502

Hello, Can I use a CGT loss incurred from share trading in 2022-23 if I didn't declare it as Losses Available to be carried forward in a self assessment return for that year? I did not submit a self-assessment for 2022-23 as only losses were made. I have made net capital gains for 2023-24 from share trading and would like to offset the 2022-23 losses against those gains. Can I use the 2022-23 losses even though I did not declare them at the time? Many thanks