On the ribbon, go to Tools > Options > General > Regional Settings.
The Regional Settings tab allows renaming of several regional based settings including:
•Report Date format
•Set report default paper to
Additionally, the actual method of GST (or VAT) calculations for a specific country can be configured via Tools > Options > Accounts where you select GST Country from the drop-down list.
All references to currency symbol $ will appear as per the default home currency.
These are global settings, ie. every user is affected by these settings.
Please ensure that your workstation Windows regional settings are also correct.