I've been self-employed since May 2004. I haven't registered with HM Revenue and Customs yet, but I'll do that next week ( I know they can fine me £100 for late registration). Now, since my earnings are so meager (I do Midget, casual translation jobs), my earnings do not exceed £3000 every year (and I have no other income at all - I get supported by my parents). I understand, that I am not liable to pay any tax BUT I'll have to pay the national insurance contributions. Can someone advice what would they be and how much should I expect to pay for the past 3 years? I really can't hire an accountant to do this job for me, because I don't have much money. I understand that I'll have to fill in a self-assessment form (IS IT ALLOWED TO BACKDATE IT 3 YEARS???), and when it comes to evidence of my income (I only accepted cach), I only kept a Midget notebook where I wrote down all income (but I didn't bother to keep track of my expenditures, receipts etc.). Is a handwritten notebook acceptable? By a 'handwritten notebook' I mean, a notebook where I've kept all the records of the cash income I've ever received (from May 2004), for instance: May 21, 2004 (Friday): a translation (Italian-English, 2 pages) to Mrs X.Y. Payment by cash received: £40 Will such notebook be accepted by the taxman when they ask for the evidence of the income for the past 3 years? Also, how do I obtain the Midget Earnings Exemption Certificate and how will it aid me? I understand that I can only get this certificate for the last tax year (isn't it?), and not for the previous 3 years. Thanks G! I'm quite surprised though that I won't be able to pay any taxes or national insurance contributions for the years 04/05; 05/06. What do I do about that, because I need evidence that I've been self-employed in this country for the past 3 years. So if I'm not allowed to pay taxes or NI contributions for the previous 2 years, then what's the solution? I don't want to have gaps in my tax record later on in life, and I desperately need to fill it in. Do you think paying the voluntary National Insurance (Category 3) contributions would come in handy in this situation?