Hi Amber86,
Welcome to Community! QuickBooks Online provides the option to apply discounts to your sales forms for your valued customers. However, there currently isn't an option to set a discount on an expense. I'd be happy to share another option!
To successfully add a discount to an expense, you'll first need to create a discount item. Here's how;
1. Open Settings ⚙ and then Products and services
2. Select New
3. Choose Non-inventory or Service for the type
4. Enter the Name “Discount”
5. Checkmark the box next to 'I purchase this product/service from a supplier', under Purchasing information
5. Use the ▼dropdown menu to select the expense account for the discount item
6. Choose an appropriate Sales tax rate and Preferred supplier
7. When you’re done, hit Save and close.
Follow these steps to add the discount item to your expense;
1. Open +New and then Expense
2. Enter the Payee, Payment account, Payment date and Payment method
3. Complete the required fields for the item on the first line
4. Enter the Discount item you created, on the second line, making the Amount a negative
5. Hit Save and close.
If you require additional assistance, please don't hesitate to contact us.
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Feel free to reach back out if any other questions come to mind. We'd be glad to assist!