How do I make a sale with Art Money?

How do I initiate a sale with Art Money? My collector has chosen to use Art Money Interest Free, now what? How do I finalise an Art Money Interest Free sale? My collector has chosen to use Art Money Buyer's Premium, now what? How do I finalise an Art Money Buyer's Premium sale? I’ve logged into my account and can’t see a pending sale? I’ve uploaded the wrong artwork details, can I update? What if my collector asks for a discount? When can I release the artwork?