How do I upload an Invoice for my Vendor without having to upload an actual file?

You can upload an invoice for your Vendor by following reading the directions here provided you have an actual file (JPG, PDF, etc) to upload.

If you would like to create an invoice for your Vendor without uploading an actual file to create as the invoice, you can do so via the bulk invoice creation form. You can use that form to create one or more invoices for Vendors who you've already onboarded onto Liquid.