Press the red [C-CE] button twice, then the yellow [+TAX] button.
Then type in the Tax percentage. Press [+TAX] again and then the [C-CE] twice again.
This works for the EL-331A Calculator.
SOURCE: sharp elsimate EL 2125E calculator
Lokks like it's available for download in several places; here's one:
http://esupport.sharp.hu/html/om/DataOutputDetail.php?TemplateLang=en&ID=2578
SOURCE: How do I set the GST/VAT tax rate on a Casio WM220T calculator
This works on several different casio calculators
Press AC butoon
Press AND HOLD % /Rate Set button for 2 to 3 seconds - This is important
Press Tax+ button
Input the tax rate you want eg: 12½% = 12.5
Press the % /Rate set button again
Voila
SOURCE: Sharp ELSIMATE EL-240SA - how do you stop this
From the manual:
SETTING THE NUMBER OF DECIMAL DIGITS
Numbers of decimal digits of calculation results can be specified by pressing [C-CE] twice, then press [C-CE]and [M+] simultaneously.
The decimal digit assignment will appear as “F” (for “floating point”), “2” or “0” on the LCD. (The default is “F”.)
Press and hold [C-CE] and [M+] until the symbol changes.
SOURCE: i have an EL-M710G calculator,
TO CHANGE TAX RATE PRESS CA THEN +TAX PUT IN 20.00 THEN DO YOUR CALCULATIONS
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