ContributionsMost RecentMost LikesSolutionsEmail: Contact based variables added I'd like to see some additional fields in the customer card, eg: Email subject line: I have some clients (eg insurance companies) that request a particular reference code (eg case number) in the email subject line for their internal routing. GST included / excluded: It's only a matter of time before I trip up, and charge GST on top for residential customers, or include it for commercial ones. I'd like to set this for each customer. "Contact-based preferences: email subject line, GST included / excluded" Re: Access customer details from invoice +1, this is pretty basic human interface stuff.