If you’re employed, the tax you pay will usually be taken out of your salary automatically.
If you’re self-employed you may need to register for Self Assessment and send a tax return each year.
There are other reasons why you might need to send a tax return, such as if you have income from outside the UK. Check if you need to send a tax return.
ENG:
https://www.gov.uk/self-assessment-tax-returns/who-must-send-a-tax-return
UKR:
