Crypto Base Value and tax for staking returns

I immigrated from Australia to the UK at the end of 2022 and with an ownership of a crypto wallet which I had bought some crypto at different times since 2018. I have some questions regarding capital gain tax and declaration of this wallet: 1. How can I declare I have a crypto wallet and will pay my tax. I was planning to declare it when I will pay my tax but want to know if it will be too late then. Should I declare my wallet even if I will pay tax later? 2. What is the base value of my crypto? The value I bought them at 2018 or the value when I immigrated into the country or on the date I became liable as a tax payer? I came here as a MSc student and I believe I become liable for tax after April 2023, since I didn't have much income before April 2023. 3. I'm receiving staking return from my POS coin. Should I declare them as income and pay tax even though I haven't sold them yet. Is it too late to declare my staking returns from 2023-2024 however small it is? Thank you & Best Regards

Hi ,
 

Please refer to : CRYPTO20000 - Cryptoassets for individuals: contents    .

Thank you .

This manual doesn't involve any answer to base value of the asset if I migrate from another country. Is the capital gain tax calculated according to the initial purchase value of the tokens or based on their value on the date I became a UK resident for tax purposes? Thank you

Hi,
If you arrived after 06/04/2015 then any foreign period is not applicable.
Thank you.