How do I change the email address from which invoices are sent to my clients?
Go to Settings > Organization Profile.
Click Configure Email Preference under Primary Contact.
Click the Pencil icon to edit and specify a different email address as the primary contact and click Save.
If you want to add a new email address, click + New Sender.
If you have multiple email addresses for an organization select Mark as Primary against the email address of your choice to set that as the primary email address.
You can also choose to send invoices to your clients using any of the email addresses added by selecting it from the dropdown.