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Some tax intermediaries have noticed that their own provisional tax calculations differ from the amounts we've calculated and reporting in myIR. This is due to the rounding method used in myIR, which is different from the method used in most accounting software and reported in our income tax return guides.

While this means that the provisional tax amount will only be out by $1.00 for a small number of people, we understand that this is causing unnecessary confusion for our customers. There is also a chance that affected customers will be subject to use-of-money interest (UOMI) due to this discrepancy.

We're working hard to fix this issue for the 2020 tax year, and we'll provide an update here once we have more information. We're currently working to correct this issue for any affected accounts and will address any impact this has had on you or your clients' accounts once this has been resolved.