Settings Taxes For Casio Tax & Exchange 12 Digits Hr-100tm

Press and hold the [%]key. The display will go clear and after a few seconds, it will show zero again.
Input the tax percentage that you want to store. (For example, if you want to set a tax rate of 8%, just press the [8]key).
Next, press the [TAX+]key.
Done !! The 8% tax rate is stored.
To apply the tax to a value you just enter a value and press the [TAX+]key or during a calculation stack, if you want to apply the tax rate to a sum, after pressing the [*]key, you press the [TAX+]key and you´ll have the calculation sum with tax rate applied.
If yo want to know the price without taxes, use the [TAX-]key.
You can also calculate the value of the applied tax using the following procedure:
Input your original value (or sum the calculation with the [*]key).
Press [TAX-]key
Press [-]key
Press [*]
The result will be the isolated tax value applied over the original value.