Welcome to DeKalb County’s Business Personal Property 2021 eFile Tax Return Procedures. ***2021 E-file closed for processing. All returns must be made in paper form. 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.