GST Supply Date is the date used by the system when calculating GST input tax and output tax. 

For instance, when submitting GST for period April - June, the system will capture all invoices with GST Supply Date between April and June for GST calculation. By default, creating an invoice will have its GST Supply Date same with its invoice date.

Follow these steps to enable GST Supply Date for editing:

  1. First, go to My Biztory to open up the settings page
  2. Under Sales, Purchases or Expense tab, tick the checkbox to enable GST Supply Date for the corresponding invoice type.
  3. Now you are able set GST Supply Date in your invoices.