As a Bidder, if you have submitted a bid for a proposal and the proposal is still open, you can edit/update that proposal at any time. To do so click on the Pencil icon related to the bid in your dashboard.
Once you click on this icon, you will be shown a view where you can update your previous information.
Once you make your edits, you can press the Update Bid button to commit them. If you want to preserve your previous bid, you can press the Download Bid button to obtain a CSV file containing your bid information.
Note, when you update a previous bid, all prior bid information is overwritten.