I have begun writing on Textbroker to earn some extra cash, but as it's pretty much freelance writing, the site says I need to declare myself self-employed (I am not employed by them), but I'm confused as to how it will affect my tax. I am only doing this in my spare time and expect to earn around £1500 so obviously I will need not be taxed, but I still need to register with them. I will also not have to pay national insurance contributions. However, this is not my only income. I am emloyed in a part-time job as well- do I need to tell them this? Also, when I leave university, I hope to have secured a teaching post (I study Primary Teaching), so what happens then, because then I will earn enough to pay tax and national insurance, but will that be automatically be deducted from my wages, and can I not pay tax on my freelance writing at the same time? I am just confused, somebody help me!