Ebay have asked I change my account to a business account

buglawton

You will be taxed on total income from all businesses minus total expenses on all businesses. The online tax submission makes the process quite straightforward.

Pennywise

For the tax return, there's no difference between self-employment, sole trader or a business - it all means the same, the terms are inter-changeable.

It's only if your "business" isn't solely you, i.e. it's a partnership with someone else, or if your "business" is a limited company, that it won't be classed as "self employment" on your tax return.