u/West_Guarantee284

A company I volunteer for has taken me on as tutor. I invoice them for my hours. The shifts will be really ad hoc and if I do 1 per month then I'd be earning just £1000 per year, I don't think I'll do this many. What are my obligations with tax? Do I need to do a self assesment each year or only if I earn over a certain threshold? Do I need to register as anything (such as a sole trader), the invoice is just in my name? I don't want to fall foul of anything.