I can’t seem to send cis invoice from iPhone app I find this hard to believe you can only do this online Need to send from site!!

We have limited features on the mobile app, danbaldock2,

Sending CIS invoice on the mobile app is unavailable. You can instead open your mobile browser and send it from there.

Log in to QuickBooks Online. And refer to this article on how to send a CIS invoice: Already using CIS in QuickBooks?

Here's another article for reference: CIS in QuickBooks.

I'll be right here if you need anything else.