Tarrant County's vendor registration is available via our Ion Wave eProcurement system. Tarrant County is soliciting proposals for its ANNUAL CONTRACT FOR COMMUNITY BASED.DETENTION SERVICES for the JUVENILE SERVICES DEPARTMENT. Org or fax it to 817-810-3100. In addition to this form, must provide copy of valid Driver's License, Tarrant County Health Permit, and Liability Insurance. (Address and additional information below regarding the Interlocal Agreement Form). Please contact Ms. Anderson at. Once the forms are submitted, the vendor setup process time may take up to 5 business days to complete. How do I find out who in the government purchases my product or service? This is a mandatory Vendor Information Form that must be completed and returned with any vendor agreement.