Drupal - Setup Discounts

In general, discount is a amount or percentage deducted from the normal selling price of the product. It is the way of offering products for sale at a low or reduced price.
You can specify the discount for the products as defined in the below steps:
Step (1): Go to Store and click on the Configuration.

Step (2): Next click on the Taxes link which manages tax rates and types.
Step (3): Go to TAX TYPES tab and click the Add a tax type link.
Step (4): Tax types categorize tax rates and specify whether or not the calculated tax should be included in product prices on display.
It contains some fields such as:

• Title: It specifies the title of tax type.
• Display title: It is the front end display of the title of tax type shown to customers.
• Description: Describe the tax type if necessary.
• Tax amount rounding mode: Specify what type of rounding should occur when tax rates of tax type are calculated for the unit price of a line item.

After done with the settings, click the Save tax type button.
Step (5): Go to TAX RATES tab and click the Add a tax rate link.
Step (6): It will open the taxes window for adding tax rate to the product as shown below.
It contains some fields such as:

• Title: It is title of the tax rate.
• Display title: The front end display title of the tax rate shown to customers.
• Description: It is used to describe the tax rate.
• Rate: It is a percentage used to calculate the tax which is expressed as a decimal.
• Type: It selects the tax type for the tax rate using drop down menu.

After done with the settings, click the Save tax rate button.
Step (7): Once tax rate is saved, click the Home link.
Step (8): On the home page, click the Checkout link to see the shopping cart contents.
Step (9): On the checkout page, you will see the discount for the product which is included in product price.