clear by pressing C/Ac. Hold down the SET button for a frew seconds until it goes blank. then press TAX+, key in the rate you want e.g 15 for 15% then press set again. Worked for me! more...
have a friend who's cash register crashed and she has this Royal 425 CX but no manual. Do you know how to enter the tax code. We tried by flipping switch to prog. then entered 7.75 and hit tax shift but that didn't work. more...