Your next step is to complete your bid or proposal. All DPS bid and proposal documents are available through Chicago.Bid Submittal: The complete bid, including specification and addenda, must be uploaded to the CTA Bonfire portal, before p.m. By completing and signing this form, Bidder makes an Offer to the State of Illinois that the State may accept. It is the responsibility of the Contractor to inquire of the issuance of any addenda. Any ideas why the market is so hot right now? I was going to purchase a property a few months ago and got out-bid then too! An invitation for bid (IFB), request for proposal.