Self assessment forms and helpsheets

You can download forms and guidance to help you send your tax return either online or by post. 

You must send your tax return by the deadline (external link) or you will get a penalty (external link)

The main tax return (SA100) 

There are two ways to do a self assessment tax return. You can: 

Getting help 

You can: 

Only fill in the short tax return (SA200) if HMRC sends it to you. You can not download it, but you can read the guidance notes (external link)

Extra sections 

You might need to fill in more sections, known as supplementary pages, if you are telling HMRC about these types of income: 

Check the full list of supplementary pages (external link) to make sure you fill in the right sections if you are sending your return by post. 

If you are sending a tax return for the 2014 to 2015 tax year or earlier, get forms from the National Archives (external link)

Sending a tax return if you are not an individual  

There are special forms if you are sending a tax return for a business partnership or non-resident company, or if you are a trustee.  

Type of tax returnForms and guidance notes
Non-resident companiesSA700 (external link)
PartnershipSA800 (external link) (including SA800 supplementary pages (external link))
Trust and estateSA900 (external link) (including SA900 supplementary pages (external link))
Trustees of registered pension schemesSA970 (external link)

If you need help you can: