Before you begin to enable the special or discount tabs for OpenStock products, you should understand why they are hidden by default.
If you are just looking to display a product special price, or discount for quantity-based ordering you can do so on a per-variant basis which allows for much better control over your stock and pricing.
By re-enabling the special tab it will allow the product to appear as a "special price" elsewhere in your store (i.e. the category or search pages) but this pricing WILL NOT affect the actual price the user pays. OpenStock is very complex in the way it works, it effectively splits up products when they have options and it allows you to have as much control over the pricing & stock for each option.
How to re-enable the tab
- In the menu system go to 'Extensions -> Modules'
- Click the Edit link for the OpenStock module
- Enable "Show Special tab on product edit page"