How to apply Discount Filter using Nop 3.40

Hi All,
I am trying to apply discount filter on the page but it is not showing under the filters widget. I have created discount attributes for the products....Please tell any one about how to use the discount filters after created of discount attribute on the product ???

Hi,

I guess you are talking about the On Sale filter in the Ajax Filters.
Please note that it uses only Old price/Price of the products. It does not use any discounts applied to products. So if you select On Sale filter this means that only products that have some Old price set will be returned.