How do I charge my customers credit card merchant fees on sales invoices?

CAUTION: Before charging credit card merchant fees to customers on sales invoices, you must seek guidance from Visa or Mastercard.

1. Create a new line item in an invoice.
2. Enter a description in the Item field such as "Credit Card Merchant Fees".
3. Manually calculate the percentage amount and enter it in the Price column.
4. Select an appropriate Revenue account in the Ledger Account column.
5. Select No Tax in the Tax Rate column.

EXAMPLE: