Yes, if you have the billing features of xTuple installed, then you can convert quotes to invoices. To convert a quote to an invoice, navigate to the list of quotes. From the list, select the quote you want to convert and then choose the convert option from the menu. All the quote information will automatically transfer to the invoice. To locate the invoice you created from the quote, navigate to the list of invoices. By converting quotes directly to invoices you can bypass the sales order process. This may be desirable for service businesses and others where inventory management, tracking, and shipment is not a core part of the business.