How to key in invoices before 0% GST is applied on 1 June 2018

First, key in your item that on the invoice.  As you can see, your items are 0% GST if you had already set your item to SR-0 like in this tutorial How to use the new 0% GST rate in Biztory?

To add 6% GST, just tick the "6%" GST box.

After that, your item will be charged 6% GST.

If the invoice doesn't have GST checkbox in invoice item, you can follow these steps: 

1. Go to your “Icon” and click on “MyBiztory”

2. Click on “Sales” and go to “Sales Preference”

3. Tick or untick the box that says “Able to set GST in invoice”

     4. Save