How do i change tax rate in DJ-220D ?

SOURCE: casio MS-120TE tax rate

Found this on the casio site worked fine on my ms-120TE
1. Press [AC]
2. Hold [SET/%] key for about 2 seconds until set and a 0 is displayed
3. Press [TAX+]
4. Input the tax rate
5. Press [SET/%]

this is the link:- http://www.casio.com/support/content/AF64A1AC-193D-4650-A9A9-98BB6FE26CFE

SOURCE: How to change tax rate on Casio MS120TV

I found the solution listed against a different CAsio Calculator.
It was .. Press AC, then hold 'set' for a few seconds then press 'Tax+' , input new tax rate then press 'set'. Job Done

SOURCE: Tax Rate

1. Press the AC button to clear the screen
2. Press and hold the Set % key until Set appears
3. Press the Tax+ key
4. Type in your tax rate (including decimal point) you wish to calculate
5. Press Set %

SOURCE: change the tax rate on calculator on MS-8TV

SETTING YOUR TAX RATE
you hold your set % button down for three seconds until set shows again, then hit tax rate button it shows your tax rate, change your tax rate then hit set your tax rate should be set.



cliff notes:
hold set% button
hit tax+ button
change the desired % 
hit set done


Do rate the solution.

SOURCE: how to set tax rate

Hold down the Rate Set button for a few seconds until it flashes. Set your rate in % so for 5% do 5 or 12.5% do 12.5. Then press Rate set again. This should sort ya out.