Before you resend the payment, make sure the details that caused the return have been updated and/or rectified correctly.
In the dashboard, click on see more under "Payments returned"
There are 2 options:
1. Export CSV
On the next page click export to CSV. Once the CSV is exported, you'll want to review and remove any payments that you do not wish to resend. After reviewing the CSV, create a new "Payments CSV file" with the returned payments and upload the file as a new batch (see How to Create a payment).
2. Resend on dashboard
On the next page, select the payment you want to return, then click on the Batch ID.
You will then be taken to a screen showing the entire batch including the returned payment(s). You will then be able to "Create a batch with all the returned payments". This will create a new batch with all the payment information which you can process again.