I made the mistake of trying to register for tax in the UK myself (eventually). I ended up getting fined for not declaring my earnings soon enough, and it was very complicated trying to fill out the right forms seeing as I was already employed full time, AND self employed (it is a lot easier if you are just one or the other).

I advise everyone to take your advice and get a good accountant to do all this for you. A good accountant may cost a bit, but will save you money in the long run.

I also attended a local Government funded ‘Start your own business’ course in which they peddled the idea that the tax man was really nice and approachable and helpful - but I have to say that this was not my experience!

NB - As it turned out my fine was 22 pence! (So I was lucky in this respect at least)…