Optimising losses...on stocks and shares

Hello, (1st question) I am of the understanding that capital gains does not need to be submitted/reported if under the capital gains allowance year - can you confirm if this is correct? i.e. if I made 1k gbp last year, I do not need to formally submit this gain with HMRC? (2nd question) Assuming the above is true, I would like to ask if I can operate as follows: - 2021/22 tax year: +2k gbp capital gain (i.e. within the allowance, therefore not necessary to file/submit under self assessment) - 2022/23 tax year: +1k gbp capital gain (i.e. within the allowance, therefore not necessary to file/submit under self assessment) - 2023/24 tax year: -20k gbp capital losses. Given the significant loss, I submit a self assessment reporting -20k gbp, therefore, I am able to use this 20k of losses to offset any future capital gains, naturally this offset precedes any applicable of the capital gain allowance for that year. Can you confirm?

Any admin can help?

Hi,
If your gains for the whole tax year are less than the annual exempt allowance, there is no requirement to report the gain to HMRC. This applies for each tax year. There is no requirement to report losses to HMRC. If you wish to set those losses against a future gain, then you must declare the losses in writing (if you do not have to complete a tax return) with supporting evidence, within 4 years of the end of the tax year the losses arise. In a tax return, the losses are claimed in the capital gains section (SA108) along with supporting evidence.
Thank you