Casio QT-6600 Cash Register Touchscreen Terminal Only w/ Free "change rounding options" Questions

Hi I bought a Casio se-s300 from someone. I was hoping that it would be simple to start up. It keeps asking me to please sign on ? But I have reset it and it keeps asking me this. I've tried to ...

...Rounding to Round up if you are not using the 1 cent anymore set calculation Type to Table and Add on Press ESC to go back to Tax Table window and choose 2- Tax Table 2 repeat the same steps as for ...