To use Inclusive Tax on your products you have to create a new Exclusive Tax Rate with a 0% rate and also a new Inclusive Tax Rate with your desired rate. For example, create a new Exclusive rate called NONE and set it to 0%. Then create a Inclusive rate called ALCOHOL and set it to 7%. Then assign both of these rates to your alcohol products.
When creating new tax rates you have to use the on-screen keyboard that pops up to create new or edit an existing tax rate. Don’t use your real keyboard. The fields will turn yellow when they are ready. Use the TAB key on the on-screen keyboard to move the yellow focus down to the % box. Enter you rate then hit Enter and it will save correctly.
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