Whether you are employed or self-employed will make a difference to the amount of tax and NIC you have to pay, as well as how you pay it.
It is important to know if you are employed or self-employed for employment law purposes too. Those who are employed or self-employed under tax law will usually be employed or self-employed for employment law, but not always. To know more click here.
Important note: The distinction between employment and self-employment is not always clear; some businesses try to exploit people looking for work, by treating them as self-employed when they should be treated as an employee.
You can read more on this by clicking here.