How do i customer pay before month end, how do i record the discount given then

I can help you record this discount detail in your sales forms, @frikkie-drcompre.

If you want to add a discount per item/service or bundle of items/services, I suggest creating a service item and associating it with a special account called Discount given. In this manner, you can track the discount amounts in QuickBooks.

Here's how to create a discount line item:

1. Go to Gear ⚙ and then select Products and services.
2. Hit the New button.
3. Select the Service item and then enter the name.
4. From the Income account field, pick Discount given.
5. From the Tax field, ensure it is nontaxable.
6. Hit Save and close.

So when you add the invoice, you can enter this service item next to the items/services on sale and then click the Add subtotal to calculate the initial amount.

Also, if you want to apply the discount to the whole sales form, you'll want to turn on the Discount feature from your Sales form content. You can check this article for the detailed steps and follow steps 1 and 2: Add a discount to an invoice or sales receipt in QuickBooks Online.

Moreover, if you're ready to record an invoice payment, you can use this article as your reference: Record invoice payments in QuickBooks Online.

Let me know if you have any other questions about discounts in QBO. I'm more than happy to assist you. Keep safe.