Emergency tax

[Dum-Dum]

Pulled from hmrc website...
Tax code 0T
Is used when your allowances have been used up or reduced to nil and your income is taxed at the relevant tax rates. May also be used if you've started a new job and don't have a form P45 or haven't completed a form P46 before your first pay day

I'v always worked income tax and NI at ~20% always seemed roughly right for me
Ni is only iirc around £56 a year or 6 months
Minimum Income before tax is roughly £177 p/w

f*ck dude, I'm not sure you even earn enough to have to pay tax. The minimum rate is about £10k p.a.