About this guidance
This guidance will provide you with information to help you file your self assessment tax return.
You do not need to provide any personal details to use this guidance. The information you provide will not be stored or used by HMRC.
This guidance covers:
- registering for Self Assessment
- finding your Unique Taxpayer Reference
- completing your Self Assessment tax return
- understanding your Self Assessment tax bill
- paying your Self Assessment tax bill
- finding your lost Government Gateway user ID or password