Hi guys, I made a website which began making small sums of money (£75 or less/month) in August 2013. It rapidly grew to produce more and more each month up to now (~£900/month) and I have yet to file my earnings with HMRC. I will not make in excess of £9440 (my personal allowance) before April and so I naively assumed that I did not need to both pay tax and also notify HMRC of my profits. I now realise that this is simply not the case and I need to register with them asap. Will I be getting into any trouble by registering with them now as a sole-trader and declaring my earnings? I shouldn't have to pay any tax this tax year (I assume?) and so was hoping this will all be okay, what is the best thing to do? Thank you for any help, I really appreciate it - have had somewhat of a headache recently!