Can I change the email address from which invoices etc. are sent?

Yes, you can, by changing the Primary contact of the organization.

To change the primary contact,

• Navigate to gear icon > More Settings > Organization Profile and click on Configure emails.
• Add the email address you want to sent the email notifications from and verify it.
• After verifying, mark the email address as primary by clicking on Mark as Primary button.

From here on, all your communications will be sent from this contact’s email address.

Note: If you already have the contact added in the organization, you can directly select the option Mark as Primary.