Creating Logins for Clients
You can give clients the ability to see their invoices, payments, and quotes by providing them a Client Center login.
To create a login for a client, go to their account and enter Edit mode. Under Settings is a checkbox to enable the Client Center. Once checked you can create their login password. The password has a minimum character limit of 6 and a maximum character limit of 16. Their login username will be the email attached to their account.