As an auditor it is your job to make sure that the accounts of the organisation are presented reasonably, this includes testing that the organisation has correctly collected sales tax / VAT / GST. Using Arbutus Analyzer it is very simple to test the calculation of the goods and services tax. In Australia, GST is applied to most items at 10%. In New Zealand it is 15% on all goods and services. For a nice overview of how the systems differ between Australia and New Zealand see (http://www.ird.govt.nz/yoursituation-bus/bus-aust-nz/tax-basics/comp-gst/comp-gst.html).
In this basic example we are going to assume that all the items are subject to GST at the Australian rate of 10% and that the amount recorded in the \"Sales Amount\" column already includes GST.
To display the GST results in a new column follow these simple steps:
1. Right click on the horizon column bar and click Add Columns
2. Then, click Expression. The expression menu will pop-up.
3. Enter the expression to calculate GST. In this case it is Value_AUD / 11
4. Click on Validate to check that the expression is valid.
5. Then press OK.
The new column formed has calculated the GST on all transactions.