Product Vendors

I was wondering if it was possible to Import Fields collected using Google Sheets and saved as a CSV, into the Vendors section as new Vendors. There is no import option there.

Also is it possible to add extra fields for the Vendor on registration like if they have HST, and what is the HST number? Is there a Partner? Partner Name, Vendor ID picks (3 spots), an embedded Terms for them to agree to use site and a way to pay (like a subscription) for monthly use of site.