August Tax Bulletin Available Now

Indiana Department of Revenue - Tax Bulletin - corkboard calendar with sticky notes

August 2023

Updates to Form WH-4

Form WH-4, Employee’s Withholding Exemption and County Status Certificate, has been updated with the following changes:

  • A new checkbox to declare if the employee moves or works in another county after January 1 and wishes to request a change to a county of residence or work for the next calendar year.
  • Line 7 has been added to claim a dependent child for the first time in order to be eligible for a one-time $3000 exemption for the calendar year during which the WH-4 exemption claim is submitted (instead of the current $1500).

See Form WH-4 for further instructions.

2023 IOA Renewal is Now Online

As of Aug. 1, 2023, Indiana Intrastate Operating Authority (IOA) renewals for 2024 can be completed and submitted online. Motor Carrier Services’ online IOA application allows customers to renew or modify their account information, view or print registration(s), and access other motor carrier services.

Customers who have not yet registered for an account at should select the appropriate “Click here” button for Indiana access, and then select “User Registration” in the panel on the left side of the Motor Carrier Services page.

The following information is required to create an account:

  • Legal Name
  • USDOT Number (required, if assigned)
  • IOA Account Number
  • Federal Tax Identification Number (FEIN)/Social Security Number (SSN)

Returning customers that are already registered can use the “Log In” button to access their account and begin their renewal. Instructions for the online IOA application are available in the Intrastate Operating Authority User Guide which is included in the DOR Guides & Manuals Library.

Information Bulletins &
Departmental Notices

Check out our Tax Library for other Information Bulletins and Departmental Notices.

Helpful Resources

Protect Yourself from Identity Theft

The IRS and Security Summit partners “Protect Your Clients/Protect Yourself” campaign recently covered simple actions that tax professionals can take to better protect their clients and themselves from identity theft.

Create a security plan – The Written Information Security Plan, or WISP, is a 28-page, easy-to-understand document developed by and for tax and industry professionals to keep customer and business information safe and secure.

Sign up clients for Identity Protection PINs – IP PINs are now offered to all taxpayers who can verify their identities online, on the phone with an IRS employee after filing a Form 15227 or in person. To obtain an IP PIN, use IRS online tool Get an IP PIN.

Phishing, Spear phishing and Whaling  – Beware of phishing scams designed to trick taxpayers into disclosing personal information such as passwords, bank account numbers, credit card numbers or Social Security numbers.

Know the tell-tale signs of identity theft – Watch out for multiple clients suddenly receiving suspicious IRS letters requesting confirmation that they filed a tax return; receipt of e-file acknowledgements for more tax returns than you filed; or when your computer cursors begin to move seemingly on their own.

Help clients protect themselves whether working from home or traveling – Share these cyber-smart tactics with your clients for awareness when conducting online business for personal, business or financial affairs.

DOR is Hiring

Work for DOR

Visit for information on competitive benefits such as affordable health care, retirement plans, generous paid leave and career development opportunities, then search for Department of Revenue openings.

Holiday Schedule

All DOR offices will be closed on the dates shown below.

DOR offices are closed on September 4