Understand your Self Assessment tax bill
Overview
When you submit a Self Assessment tax return, you’ll get a:Â
- Self Assessment statement (also known as your bill)
- tax calculation (also known as an SA302 or tax computation)
Your Self Assessment statement is a summary of what you owe and payments you have made.
Your tax calculation is a summary of the tax you owe for the tax year.
This guide is also available in Welsh (Cymraeg).
Paying your Self Assessment tax billÂ
You need to by midnight on 31 January (following the tax year you’re paying for) to avoid a penalty.Ìý
Find out what to do .