How do I apply a discount to a customer payment and allocate it to an already created account?

I'm here to help you figure out how to apply discounts on your sales in QuickBooks Online (QBO) and allocate them to the account you already created, erbt.

We can't directly apply a discount to a customer's payment. Instead, you can add the discount to the invoice before the payment. 

If you've already made or recorded the invoice and its payment, you can still edit the invoice to add a discount. Here's how:

1. Make sure to turn on the Discount feature from the settings.
2. Go to the Sales menu, then click on Customers.
3. Find the customer's name and click to see their transactions. Then, click on the invoice you want to update.
4. Enter the discount amount in the Discount field.

To ensure the payment goes into the right account, open the payment. Then, click on Deposit to and choose the correct account you made.

This method will add a credit for the discount amount if your customer has already paid the full invoice without the discount.

If you need to refund your customer's money or manage it differently based on your preferences or different situations, you can check out these articles for more helpful tips.

• Handle a customer credit or overpayment. 
• Record a customer refund.

Finally, you can check out these articles to get more advice on dealing with sales and customers.

• Add, organize, and send invoices.
• Topics about your company's income and customers.

Feel free to reach out again if you have any more questions or need further assistance with managing customer payments. I'm here to help whenever you need.