In Shopify for South African VAT, why can't I select “All taxes are included in my prices”, as this is the South African standard?

When the products are set up with the total price, and the tax settings are configured as per our instructions, this naturally displays the price to the customer as the total VAT inclusive price. This will be the case for all amounts, including recurring amounts.

Unfortunately, a different configuration of tax settings will not be suitable for South African requirements, as Shopify does not cater for this.