The supplier bill is all paid, how to write extra payment for a supplier

Welcome to the Community, zakikhaliqyar84.

I can help you record the extra amount you've paid to the supplier in QuickBooks Online (QBO).

If you want to apply the amount towards any open or future bill, we can record it as a Supplier credit to your vendor. This method ensures that it applies to the expense account you use for this supplier. I'll show you how to do it:

1. Click + New or + Create.
2. Select Supplier Credit.
3. In the Supplier dropdown, choose your supplier.
4. Depending on how you record purchases with this supplier, enter the Category details or Item details. Usually, this is the category, product or service you're getting credit for.
5. Tick Save and close.

Once you're ready to use the credit, you can follow Step 2 from the If you enter bills you plan to pay later section in this article: Enter supplier credits and refunds. It also contains steps if you want to have the amount as a refund. 

Let me know if you need further help or guidance. I'm always here to assist.