1. reciProfity only needs the vendor name, which you can add on the fly as you add your ingredients or upload an order guide.
2. If you want to export a PO using email you will also want to add the vendors email address.
To add or delete the vendor name AND email address:
Click on the Gear icon/Setup/Vendors:
You can also add/change/delete your vendors this way.
You do not need any other fields except for the vendor name and email address if you want to export your PO by email. You can ignore all the other fields.