Print Amount Paid on an Invoice with no Payment Applied

By design the Amount Paid only prints on invoices which are partially paid or paid in full.

A. Create a formula field for Amount Paid
1. Navigate to Customization > Lists, Records & Fields > Transaction Fields > New
2. Enter field name on the Label field. (Ex. Amount Paid)
3. Uncheck the Store Value field.
4. Set the Type field to Currency.
5. Check the Sale checkbox on the Applies To tab.
6. Click Validation & Defaulting tab.
7. Set the Default Value to {amountpaid}.
8. Save.

Note: Default Value can also be set to {subtotal}+{discounttotal}-{amountremaining}. .