With Tappr, it's easy to apply Good and Services Tax (GST) to your products. You can automatically enable GST by default, include GST in the sales price and edit the tax settings for each item. Note: Only businesses registered for GST can include GST in item prices. Additionally, this feature is currently only available on iOS.
On the main page of the Tappr App, tap the three horizontal lines in the top left corner (pictured below).
Tap Settings (pictured below).
Then tap Tax (pictured below).
From there toggle New products have GST enabled by default and Included in price to (on) or (off) and then tap Save (pictured below).