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The tax year is from 1 April to 31 March.

At the end of each tax year we'll send you one of these:

  • an income tax assessment
  • a request for more information – income tax assessment
  • a message to complete your individual income tax return - IR3 in myIR, or a paper copy by post.

We work out if you’ve paid the right amount of tax each year using the information we hold about your income and the tax you’ve paid.

Once you receive your income tax assessment you need to check it and tell us about any changes. If it's correct and you have no tax to pay then you do not need to do anything else.

Otherwise, you need to tell us about other income you received and any expenses you need to claim.