I need to change the tax rate on a royal alpha 600sc

To program a sales tax rate of 6%
1 Find your sales tax rate. You may need to contact your local government
office.
2 Put the PRG key in the Mode key slot and turn it to the PRG position.
3 In the round Number keys area, press 1 and then press the Tax 1 key.
4 Press 6000 and press the Amount Tend Total key. Your sales tax is
programmed.