Hi @agent mulder,
As of this time, there isn't an option to delete your customers' payments in batch.
In the meantime, you'll have to manually delete each payment that is linked to your customers' invoices.
Let me show you how:
- Go to the Sales page.
- Select Invoices.
- Find and click to open your paid invoices.
- Click the Payment Made hyperlink below the PAYMENT STATUS option.
- Hit the date to open the payment.
- From the More option, choose Delete.
- Select Yes to confirm the deletion.
Once done, you'll be able to delete the payments of your invoices. And then you can start creating a receive payment transaction to your customers' invoices.
Here's an article you can read to learn more about deleting invoice payments: How to Void or Delete an Invoice or Other Transactions?
Feel free to leave a comment below if you have any other questions. I'll be always around to help.