Self assessment registration for both sole trader and saving interest

Hi, I am a sole trader with income to tax using self assessment, at the same time I also have interest income over 1000 pounds, which option should I choose for self assessment registration? Should I register both 'business tax account for sole trader' as well as 'self assessment return if you are not sole trader'? As I can't add my interest income in my business tax account, but confused

Hi hy675,
You will register as self employed and then you can declare the savings income on your Self Assessment tax return.
You can register here:
You will register as self employed and then you can declare the savings income on your Self Assessment tax return. You can register at https://www.gov.uk/set-up-self-employed
Set up as a sole trader: step by step
Thank you.