Step 1: Click on Monthly >> Accounts from the left side menu of the screen
Step 2: Click on the Monthly Customer Account
Step 3: Click on Edit Account
Step 4: Edit all the details as needed (Names, Emails, phone numbers, etc.)
Note: For Email and Phone Number, click on the red (x) button to remove the original Email or phone number, then type the new information in the corresponding fields and click on the green plus (+) in order to add it.
Step 5: Click on Save at the bottom of the page.