1. Go to Order Screen
2. Click on The Order info Button on the top
3. Enter the phone number to find the customer
4. Select the Account to be linked to the customer on the dropdown next to the Link Account button
5. Click on Link Account button to link account with the customer
6. Click on Account Button in the middle to open the Account Management Screen
7. Select the account
8. Click on Payment
9. Click on pay after select the Credit in the drop down
10. Click on Existing Card
11. Select the credit card in the pop up
12. Click on pay