Tax file numbers and super contributions

Interest on overpayment

You must self-assess any interest on no-TFN-quoted tax offset in the current year. To help you work out this interest, an interest on overpayments (IOP) calculator is available.

To access the calculator, refer to No-TFN tax offset - IOP calculator.

There is a label on both the fund income tax return and the SMSF annual return, where you show the amount of interest on no-TFN-quoted tax offset claimed in the calculation statement.

Sections within Claiming back additional tax

• Interest on no-TFN-quoted tax offset
• Interest on overpayment
• Evidence required to claim interest
• Calculating interest
• Period of interest