Self Assessment: Foreign Interest + Capital Gains

Hi HMRC, I am a UK resident and domiciled here. I make £8400 part-time. All of the following is for the 2024 - 2025 tax year, which I believe I have until October 2025 to register?: I MAY make more than £3000 in capital gains from cryptocurrency. This is not certain yet because I haven't sold all the assets but expect to by April 2025. Do I need to declare this whether or not I make over £3000? On the registration form, do Capital Gains count as "I've untaxed income which cannot be coded in PAYE"? I'm aware I have £5000 as a starting rate for savings and a further £1000 personal savings allowance. However, I expect to make over £6000 in UK interest and abroad interest. On the registration form, does it count as "foreign income" or "I've untaxed income which cannot be coded in PAYE"? Lastly, I am already taxed 15% abroad (I think) for foreign interest received, which I'm not sure how much I'll receive in total by April. Will the self assessment form allow me to claim tax relief on this? Thank you

Hi SB04,
Capital Gains arising from the disposal of crypto can be calculated at at Tax when you sell shares.
You can report and pay your Capital Gains tax at: Report and pay your Capital Gains Tax.
You have until 31 December after the tax year has ended to report using this service, after which you must declare on a Self Assessment tax return.
Thank you.