Can anyone tell me what I need to do if I need to invoice someone £200 for freelance work done this year. It is the first work I have done this tax year (I stopped formal out of the home work last year). I have done some formatting and proof-reading work for my uncle, but all through the proper business channels at his end.
Do I simply send him (his company) a letter detailing what I did and stating amount?
Do I need to separate out VAT or anything (we have an agreed amount for the work)?
Do I need to declare this to anyone?
Aaagh - am completely clueless 
Thanks in advance 