How do i deduct a discount from my invoice once payment is received

It's good to see in the QuickBooks Community, watamucurios. I'll ensure you can deduct a discount from an invoice after the payment has been made by performing the steps below.

I suggest updating the created invoice and applying the discount from there. There are two different options to achieve this in your sales forms. You can add a discount to the subtotal of your entries as a percentage or value by turning it from the Sales tab. Or, add this to your sales form as a line item where you can include a description of what the discount is for. You may follow the steps below depending on your preference.

Here's how to turn on the discount setting:

1. Select Settings ⚙ and then Account and settings.
2. Select the Sales tab.
3. In the Sales form content section, select the pencil ✏ icon.
4. Turn on the Discount setting.
5. Select Save and then Done.

Once done, the optional discount field is displayed in the subtotal of your sales forms. However, your customer will only see it if you add the discount to the area.

Then, you may open this article to see the detailed steps on how you can add a discount as a line item on your invoices: Add a discount to an invoice or sales receipt in QuickBooks Online.

Lastly, refer to this article if you need steps on how to record invoice payments to show the entries as closed in QBO: Record invoice payments in QuickBooks Online.

Don't hesitate to reply to me and let me know if you have additional queries about managing discounts in QuickBooks. I'm always here to help if you need anything else, watamucurios. Stay safe!