Click Create Quote in the top right hand corner of your bid when you are ready to supply a response to the bid. You can save your in-progress quote at any time by selecting Save at the bottom of any tab. The Customer will not be able to view your quote until you officially publish it (Click Publish from the Publish Tab). The Create Quote tool will guide you through supplying a response step-by-step.
See the articles below for additional information on Bid Requests:
Joining and Accepting a Bid Request
Bid Request - Confirming Bid has Been Submitted
Submitting Bid Questions & Messages