When i send invoices to customers and then they respond i am not getting the email it is going to a colleague out of the office. how can i fix this

Hi angie16, 

It is not possible for the customer to respond directly to the email which has been sent via QuickBooks, if the customer-facing email appears on the invoice then you can edit the template on the invoice by going to the Cogwheel > Custom Form Styles > Edit > Content > Email. 

Thanks