While not required, registration as a vendor with the State of Iowa, is strongly recommended. For very good information on the vendor process in general, but focused on bidding opportunities rather than emergency purchasing, please see the following website:
https://das.iowa.gov/procurement/vendors/how-do-business. This site has an option for vendor self serve (VSS) registration, which is designed for first time vendors to respond to a specific Request for Bid or Proposal.
However, it may be more efficient for you to allow HSEMD to assign a vendor identification number to you at the time of purchase. HSEMD can enter your information into the state system, with the information provided on a copy of the W9 for the "Legal Business Name" above. Once HSEMD has established a vendor identification number, it will allow for accurate and speedy ordering and payment for all purchases and will also serve you on all future transactions including Requests for Bid or Proposal.