I have recently started working for a company who are paying me into my hand by cheque. I have to sort my own tax out but have no idea how to go about it. Do I to register myself as a sole trader/freelance worker with the Revenue? Is there a form for such a purpose? Do I have to fill in a tax return for this year (I started in October)? The Revenue site isn't very helpful at all so any help would be greatly appreciated.