The right route for the Reckon you run
Reckon is several products under one name. Reckon Accounts and Reckon Accounts Hosted come from the desktop line. Hosted runs the same software on a server somebody else looks after, reached through Citrix or a remote desktop session. Reckon One is the cloud product, with a different API entirely.
So the same request, such as getting invoices in from another system, is a different build on each. We settle which one you run before anything else.