Changed the ink roller on my Casio HR-100TM and now when I am adding numbers the division sign appears next to the numbers and not the addition sign. The calculation answer is correct.

SOURCE: Set Tax rate on a Casio HR-100TM

Press the CA button twice. Then push and hold down the %/set key until the 0 dissappearsd and reappears. Then type in your tax rate and the percent key (eg: 8.25%) and then press the TAX+ key. It should save the new tax rate.

SOURCE: Is there an ink cartridge/ribbon to change on the

You need an IR40T Ink Roller

SOURCE: Cannot change +5% TO -10%

Hello,
To chance tax rate follow this: Press the CA button twice. Then push and hold down the %/set key until the 0 dissappearsd and reappears. Then type in your tax rate and the percent key and then press the TAX+ key. It should save the new tax rate.
I'm not sure if you can set negative tax values. I believe it is meant for positive tax percentages only.
Chris

SOURCE: how to load paper in

Put the roll on the arms "like a toilet paper roll on the extender", and pull it under. There is a slot, slip the paper into this slot, and press FEED until the paper reaches the ink.