Please see the extract from the ATO GST Article from 19/04/2000.

"Businesses can now choose the total invoice approach or the line item approach for their GST calculations."

"A business can total the prices of all taxable items, where the GST is 1/11 of the price, on an invoice and then make a single 'divide by 11' calculation of the gross taxable amount to arrive at the total GST. This total will then be rounded to the nearest whole cent. The rounding rule will be: round down to the nearest whole cent below half a cent; round up to the nearest whole cent from half a cent. "

"A business may also calculate the GST on each taxable item or invoice line and add up these amounts to arrive at the total GST for an invoice or for the total GST liability.

In taking the line item approach a business must record the GST on each taxable item or line of items to as many decimal points as their system allows. "

Iinsight uses the line item approach and the system allows 2 decimal places.

Therefore iinsight complies with the ATO requirements.