To setup the button that will appear on your invoices, just follow the guidance below:

1. Click Settings > Card Options >PayOnline - Customer Payments.
2. Here you can either choose to enable the option ' Use above settings' or leave it unticked and enter new details here as prompted > Update.
3. The pay online button will now appear on all unpaid e-mailed invoices.
4. When the customer makes a payment the invoice will be automatically marked as paid, the payment will be recorded on the customers invoice in the payment details section in Tally along with the card processors authorisation code.