Simultaneously, the escrow agent in Maricopa reviews and verifies the necessary documents related to the sale. For questions regarding the application process for Maricopa County, please call the Clerk of the Board's Office at: 602-506-3766 or send an email.How do I submit a bid or proposal? All formal bids and proposals shall be submitted as specified in the solicitation document. The contractor will then report the retail equivalent tax due under business code 315. Businesses interested in development opportunities should reach out to the Office of Economic Opportunity at 5204942360. Completing the Supplier Registration does not guarantee that a supplier will be notified of potential Request for Proposal (RFP) and Invitation for Bid (IFB).