Welcome to DeKalb County’s Business Personal Property 2019 eFile Tax Return Procedures. 2019 E-file closed for processing. Please file return by mail Please Enter Your Account Number and PIN Number Account Number PIN Number     * The Account Number is a seven digit number (no letters). The PIN Number is a ten digit number. Freeport Exemption Applications must be filed in paper format only. Aircraft and Marine are not able to file electronically at this time.