Self Assessment guides

Get your Self Assessment checklist

Download your guide to completing every step of your Self Assessment tax return with ease. Simply follow the checklist from registration through to filing and take the stress out of this year’s return.

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Guides to help you breeze through your Self Assessment tax return

Not sure where to start with your tax return? In the middle of a post-deadline panic? Whatever your Self Assessment query, we can help! Simply browse through the list below to find the right guide for you.

Preparing to file

Completing the return

Filing Self Assessment online with HMRC

After the deadline

Important dates

Online tax return deadline

Midnight, 31st Jan 2023

Tax year to file for

6th April 2021 to 5th April 2022

Final payment of any tax due

Midnight, 31st Jan 2023

Penalty for late filing

HMRC will issue a late filing penalty of £100 for tax returns that are up to three months late.