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Indiana Department of Revenue

DOR > Business Tax > WH-3 Withholding Tax Electronic Filing  > Taxpayers with More Than 3,500 W-2s Taxpayers with More Than 3,500 W-2s

Step 1: Register for INtax at
Step 2: Batch upload your W-2s.

The bulk file upload is a system for uploading electronic files containing tax return data to the Department of Revenue’s system. Batch upload submitters must be pre-registered and certified to use the system. This is the Department’s preferred method of electronic filing if a company has more than 3,500 employees W-2s.

To submit a file to the Department’s Bulk Upload Web site, you must do all of the following:

  1. Have a valid Indiana Taxpayer Identification number (TID) for each return
  2. Be registered in INtax if you are a service provider (the clients included in the file do not have to be registered)
  3. Have a text file in the prescribed SSA EFW2 format (
  4. Use PGP encryption software to encrypt file before sending them (
       - Install PGP Software
       - Request Public Key from the Department (
  5. Use the following software to connect to the secure FTP site:
       - Request User Name and Password to secure FTP site from the Department (
  6. Successfully complete an upload of two test files to the FTP site listed in step E.

You can find more information about uploading a bulk file at

Additional Resources

Contact Us

Phone: (317) 233-5656
Address: Electronic Filing Coordinator
Indiana Department of Revenue
100 North Senate Avenue, IGC N286
Indianapolis, IN 46204-2253