To add a new coupon first access the coupon setting.
To access coupon setting,
Start from main screen > MENU > SETTING > PAYMENT > COUPON
Press ADD NEW COUPON to add a new coupon.
Press name box to input name. After that, choose the discount type and input the amount.
After you are done making the coupon, check the USE BOX and press save. Restart POS program.
To use the coupon, while on the sales screen use the discount function and on left side of the discount window, the coupon will be displayed.