You should check all the details from your income tax notice of assessment with the details contained in your tax return. If you think there is a problem, phone the Tax Office on 13 28 61. When you phone, have your notice of assessment and, if possible, a copy of your tax return with you.
After speaking to the Tax Office, if you still believe your compulsory repayment amount is incorrect, you may request an amendment or lodge an objection with the Deputy Commissioner of Taxation. Information on how to request an amendment or lodge an objection, including statutory time limits, is available from the Tax Office.