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You can complete this form to estimate or re-estimate your interim payments. If you have chosen to estimate your interim payments you cannot change back to the standard option for that year. Estimates or re-estimates must be made before the due date of your third instalment.
You will need to re-estimate your student loan interim payments you will need your IRD number, and an estimation of your income for a full tax year.
After you finish, send the completed form to Inland Revenue before the third instalment of your interim repayment is due.