First you will need to add a custom field to the Quote Product form. I called this new_percentagediscount. Notice that I specified a Minimum and Maximum value for the field of 0.00 and 100.00 respectively.
Note: I did disable the Percentage Discount field until after the first save so that the function will have values for “Price per Unit” and “Quantity”.
Here is an example of what a Quote Product looks like with a discount applied.
By: Jon Angell – Minnesota Microsoft Dynamics CRM Partner