Follow the steps below to add the email ID to the invoices

  1. Go to the TimeTracker Flags object.
  2. Search for the flag titled "invoice_email_org_email_id" and click on it.
  3. Enter the desired email address in the Text Value field.
  4. Click Save to apply the changes.

Once configured, the email ID added to this flag will automatically appear on the invoices generated in your organization.