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Income tax Dates

  • MAR 31
    Final date for ratio option provisional tax applications.
  • APR 7
    End-of-year income tax and Working for Families bills are due if you have an extension of time to file your income tax return.
  • MAY 7
    Provisional tax payments are due if you have a March balance date and use the standard, estimation or ratio options.

Log in to myIR

Log in to myIR and select the individual tax return you filed.

Fix the mistake

Amend your return, tell us why you amended it and resubmit your return.

What happens next

We process your corrected return and send you a notice of assessment showing any refund you are due or tax to pay. We send the assessment to you within 10 weeks.

My responsibilities

You need to keep these records and provide them if we request them:

  • the return period the mistake occurred in
  • the amount involved
  • the nature of the mistake
  • the return period the correction was made.

Keep a copy of all returns that you send to us. This will help if you need to make changes to a return and support what you have done.

You can call us and ask us to fix your mistake.

Call us on 0800 775 247