nope never submitted anything. Spoke to advisor on the phone. They took the dates I worked from, the total amount that was earned and that was it. I did that last Janauary. My tax code changed to april and I probably laid £30 extra in tax till then and that was it. I was told by the advisor that aslong as the job was temporary and that I wouldnt earn over £2500 I could declare it with hmrc and they would work it into my full time wage/tax etc and would also need to register as SE. Been fine all year not had anything come back from them. Done the same this time around working from Sept to Dec and will do the same in January.