I want to change the payment status from paid to unpaid. How Can I do this ?

I can see how important it is to change the payment status of your invoice, finance-adstacks. I'm here to help you with that.

To change the invoice to unpaid, I'd suggest deleting the payment linked from that transaction. I'll show you how:

1. Go to the Sales menu and then select Invoices.
2. Find the invoice you want to change the status.
3. Click the Edit button.
4. On the Invoice page, click the 1 payment made link.
5. Click on the date hyperlink.
6. In the Receive Payment screen, click More at the bottom.
7. Select Delete, then click Yes to confirm.

Once done, the invoice will now show as unpaid. If you're ready to mark it as paid, you can record the payment in the program. 

Additionally, you can run the Customer Balance Summary report in QuickBooks Online. This helps you see the remaining balance of your customers. You can also print or export the data to Excel. Here's how:

1. Go to the Reports menu.
2. Find and open the Customer Balance Summary report.
3. Select Run report.
4. Review the customer's open balance in the Total column.
5. You can either click the Print or Export icon.
   

Please come back and keep us posted on how it goes, finance-adstacks. It's our priority to ensure you're able to change the status of your invoice.