Where you have a transaction that requires the handling of GST on Contract Price and/or adjustments, there is no automated GST calculation within the Basic Settlement Calculator. If you do transact in a high volume of Commercial settlements, we do suggest upgrading to the Premium Version of the Settlement Calculator which does have inbuilt automated calculations for GST components.
For the Basic Calculator, however, the only way to record the GST component is to manually calculate and add into the statement using the Other Adjustment - Fixed option
You simply just add the calculated figure as a single row
This will then merge into the Statement as follows