Should I have registered for self-assessment and have sent self-assessment tax return?

Hello! I am Uk resident and in 2022-2023 had foreign income from interest from deposit less than the personal allowance. I used this link https://www.gov.uk/check-if-you-need-tax-return in order to check if I need to send a self-assessment tax return and I received the “no” answer. I would like to double check, if I should have registered for self-assessment and should have sent a self-assessment tax return? And if yes, what penalties can I have for missing the 5th October and 31st January deadlines? Thank you in advance.

Hi Katerina Kamardina,
If you have foreign income or capital gains, regardless of the amount, you meet the criteria for completing a self assessment tax return, even if you do not have to pay tax on the income or gains in the UK.
Thank you.