Before you start your registration, please collect the following items:

• Your taxpayer identification number and certification
• Your company/organization's main contact name, address, phone, email
• Your California Sales Tax Permit number, if applicable
• A list of the types of Products and/or Services your company provides

 Please note that the County will verify the Tax Identification Number (TIN) using IRS TIN Matching program for the TIN and the name on the provided Form W‐9 (or Form W-8 for foreign vendors) matches the IRS records.

      If you need assistance, please contact LA County - ISD Vendor Relations:

      Hours:  Monday - Thursday (7:00 a.m to 5:00 p.m PST)
      Email:   ISDVendorRelations@isd.lacounty.gov