Gravity Forms eCommerce Fields adds Discount, Tax and Subtotal pricing fields to your forms. It also improves the Gravity Forms Coupons and Shipping fields so they work with the new fields.

The Tax field applies a percentage to all products, specific products or all but selected ones. The Discount field applies a flat or percentage amount to the total or to chosen products, and conditional logic can limit when it applies. The Subtotal field shows the sum of line items before shipping, coupons and taxes, and you can add one for a group of products.

The {subtotal}, {coupons} and {discounts} merge tags work in calculation formulas. An {order_summary} merge tag shows a revamped order summary in confirmations and notifications.