The discount fields are located in the lower part of the Main Purchase Order Screen:

Overall Discount

If you are discounting this sale, place the amount of the discount in this blank.  The discount should be entered as a whole number: 25 means 25%.  The number you enter here will discount every product on the item list the same amount.  If you need to discount products at different rates, you can do so by entering the appropriate amounts in the discount column in the Item Area.  For more details on how discounts are calculated, the relationship between the Discount and Less Discount blanks, and how you can work backward from a total and have the program calculated the appropriate discount, see Discount and Less Discount.

Less Discount

Instead of entering a percentage amount of discount in the Overall Discount blank (described above), you can also enter a dollar amount.  After you enter a number, the program will automatically calculate the percentage amount and enter it to the right of the Overall Discount blank. For more details on how discounts are calculated, the relationship between the Overall Discount and Less Discount blank, and how you can work backward from a total and have the program calculated the appropriate discount, see Discount and Less Discount.