1. Go to Invoices page and add a New Invoice. 

2. Fill out all the invoice fields and add all invoice items as usual. 

3. Add a new item to use as discount item. 

4. Fill out the item details in the pop up window: item name (e.g. Discount), price (e.g. -1,000), and quantity (e.g. 1) Note: The price field for your discount must be negative, e.g. -1,000

5. Click on the blue Save button.

You can now use this item to deduct fixed discounts from your invoices.