How do I retrieve and submit a response I drafted earlier?

Log in, and then click My Responses for responses you have prepared, including responses with a status of Draft. Select the draft event whose response you want to change. Select Actions > Open. The terms and conditions will already be marked as accepted; click Continue. To respond to a line, click the Respond link next to the line. To edit your response to a line, click the Edit Response link next to the line. To manage any attachments to your responses, click Continue. When you are done with all your line edits, select Continue through to the Submit Response page. Click Submit, then Done.

You cannot respond to an event after it is closed, even if your draft was begun before the close date.