This method is common on models like the S100, RT-7000, and J-120F.
Press the x (Multiplication) button, then press the % button again to save. How to Use the Tax Function After Setting how to set tax rate in casio calculator
Most modern standard Casio models (like the MS-80 series or HL-122TV ) use this sequence: : Press [AC] to start fresh. This method is common on models like the
Now that you know how to set the tax rate, put your Casio calculator to full use – and never manually add sales tax again. Now that you know how to set the
Casio calculators use a "Two-Way Power" system combining solar panels and a small coin battery. If the internal backup battery is completely dead, the calculator will only work when exposed to direct light. The moment you put the calculator in a dark drawer or briefcase, the memory clears, resetting your tax rate to zero. Replacing the internal battery fixes this permanently.
Press the % (TAX RATE) button again to lock in the new rate. The calculator will now use this percentage until changed.