What is the purpose of the IT key function in HR-100TM Casio

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: how to reset tax % on casio HR-100tm

Hi,

Press the CA button twice. Then push and hold down the %/set key until the 0 disappeared 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.

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SOURCE: THE CASIO HR-100TM HAS AN E ON THE SCREEN AND

First, check the batteries, and ensure there is not a paper jam in the printer.
If both are fine, then while the calculator is in the "Print" mode, press the [CA] (or [AC]) button 20 times consecutively to clear out memory buffers. Try some numerical calculations, and if the problem persists, repeat pressing the [CA] button 20 times.
If the problem still persists, then the calculator may require service. http://www.casio.com/support/techsupport/AABF4C3A-D2EF-4BF5-B349-48459AF35FF0

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

You need an IR40T Ink Roller

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.