How to fill out your tax return

Tax returns

  • The self-assessment tax return system explained
  • Paper and online tax returns: how to fill yours in
  • Late tax returns: avoid penalties by meeting HMRC's deadlines, highlighted here
  • Self-employed tax returns- special considerations

What's in this guide

Who should submit a tax return?

Which? explains who needs to submit a tax return and top tips for minimising the stress of self-assessment tax returns.

Tax returns 2016: important deadlines

Which? guide to self-assessment tax returns. How to submit your tax return, plus tax return deadlines for the tax year 2015-16.

Self-employed tax return

How the self-employed should complete a tax returns and all the essential information you need for a self-employed tax return.

Online tax returns

Which? explains the advantages of online tax returns, how to register, and how to fill out your online tax return.

Paper tax returns

Expert tips for filling out a paper tax return, plus expert information on how to fill out supplementary pages on your paper tax return.

Late tax returns and penalties for mistakes

What happens if you file your tax return late, plus information on the penalties and fines for filing an incorrect tax return

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