Essentially, a Self Assessment (or maybe Form SA100) is HMRC’s way of finding the total amount Income Tax along with National Insurance you’ve paying on every wage that is not saddled in the cause. Workers have the Income Tax of theirs deducted effortlessly from their company pay – this does not happen for self employed employees, or maybe for many various types of income, for instance, pay or advantages from reserve money & speculations, and that is the location the Self Assessment is available in.

Self Assessment Tax Return