1. Click on the Sales option on the left-hand menu.
  2. Click on Customers.
  3. On the Customers page, find the name of the customer whose information you would like to edit.
  4. Click on the Customer you'd like to update.
  5. Click on the Edit customer button.
  6. On the Edit customer page you can change several details, such as the customer name, email, the name of your main contact if your customer is a company, and the currency you conduct your business in with that customer.
  7. Click Save to finish editing.