Hi there.

In QuickBooks Online (QBO), there isn’t an automatic feature to apply early payment discounts directly to invoices. Discounts must be calculated and applied manually when recording payments from customers who pay early.

You can refer to this article for additional guidance how to manually apply a discount: Add a discount to an invoice, estimate or sales receipt in QuickBooks Online.

If you have additional questions or queries, don’t hesitate to utilize the comment section below.