To set up credit cards, go to Setup > Accounting > Credit Cards. This page shows the credit cards that have been set up.
To add a credit card, click Add Credit Card.
To add credit card transactions and reconcile the card, click a credit card link on the Credit Card page.
This shows the balance of the credit card as a liability; it is positive if the total credits are greater than the total debits, and it is negative if the total debits are greater than the total credits.
Add Payments includes Credit Card Option
When adding a payment for a vendor, users can choose Bank Account or Credit Card.
Adding a payment using a Bank Account:
Adding a payment using a Credit Card: