Thanks Mark,

Zapier don't build the integrations on their site. they simply provide the platform for different apps to connect to each other. The developers of the apps build the integrations. GoCardless, for example, hasn't built any Zapier integration so you see this message when you search for it on Zapier: Gocardless Integrations | Connect Your Apps with Zapier

QuickBooks has built a pretty comprehensive range of triggers and actions: QuickBooks Online Integrations | Connect Your Apps with Zapier. As such, QuickBooks allows me to edit virtually every field of an invoice via Zapier. However, among all of these fields they haven't made the 'Use Direct Debit' radio button available. That's why I'm asking if QuickBooks could please make this available along with all the other fields they have made available. Others are asking about this on the Intuit Developers site but I haven't been able to get a reply there yet. It just seems like such an odd thing to miss out given how widely used direct debits are in the UK.