Set your default rate, decide whether prices include tax, and override per category where a different rate applies.
Decide inclusive versus exclusive pricing before entering product prices. Inclusive means the price on the shelf already contains the tax and WakaERP extracts it; exclusive means tax is added at the till. Switching later changes what every existing price means.
Tax configuration is the Accountant role's own area — it no longer requires blanket settings access, so an accountant can manage it without also being able to change your integrations or API keys.