The UK Government website has a bunch of entries related to crypto on their website, which should probably be read throughout thoroughly:
https://www.gov.uk/hmrc-internal-manuals/cryptoassets-manualAdditionally, in relation to the calendar, there is an entry on the site that depicts how to deal with the dates related to the fiscal year (note that the example fiscal year is not up-to-date with the running cycle):
https://www.gov.uk/self-assessment-tax-returns/deadlinesThe above link depicts that (abstracting the Year for a general approach):
- The fiscal year goes from 6 April Year X to 5 April Year X+1.
- Paper return for the above period should be submitted by 31/10/Year X+1
- Online return for the above period should be submitted by 31/01/Year X+2
In practical terms, for the ongoing fiscal cycle it should go as:
- The fiscal year goes from 6 April 2023 to 5 April 2024.
- Paper return for the above period should be submitted by 31/10/2024.
- Online return for the above period should be submitted by 31/01/2025.
In other words, if you sell now, you’ll need to see to the associated taxes for this fiscal cycle by 31/10/2024 or 31/01/2025 as per the above. If you sell after the fifth of April 2024, the dates shift forward a year.
Bear in mind that you may need to consider capital gains and/or income tax:
https://cointracking.info/crypto-taxes-uk/Important Note:
Any advice read here should be contrasted with multiple sources (the more official the better), and not be taken for granted. I am good willed, but not versed on the matter in the UK.