If you’re running a business in Indiana, you’ve likely heard of the Indiana Tax ID Number—also known as a State Tax Identification Number or Registered Retail Merchant Certificate (RRMC) number. But if you’ve misplaced it or never received it, you might be asking: how do I find my Indiana tax ID number?
This guide explains where to find it, how it’s used, and what to do if you can’t locate it.
What Is an Indiana Tax ID Number?
The Indiana Tax ID Number is issued by the Indiana Department of Revenue (DOR) and is used for:
- Collecting and remitting sales tax
- Filing state business taxes
- Hiring employees in Indiana
- Reporting withholding tax
It’s separate from your federal EIN, which is issued by the IRS.
How Do I Find My Indiana Tax ID Number?
Here are several ways you can locate your Indiana state tax ID number:
1. Check Your Indiana DOR Paperwork
If you’ve registered your business in Indiana, you should have received a Registered Retail Merchant Certificate (RRMC) or another confirmation from the DOR. Your state tax ID number will be listed there.
2. Look at Past Tax Filings
Review previous IN sales tax filings or withholding tax reports. Your Indiana tax ID number will be printed on these forms.
3. Log Into INTIME (Indiana Taxpayer Information Management Engine)
Visit INTIME.dor.in.gov and log into your account. You can view your tax account and locate your state-issued ID number there.
4. Contact the Indiana Department of Revenue
If you can’t find it using the above methods, call the DOR Customer Service at:
- Phone: (317) 233-4016
- Hours: Monday–Friday, 8 a.m. – 4:30 p.m. ET
Have your business information ready for verification, such as your legal name, EIN, and business address.
What If I Never Applied for an Indiana Tax ID?
If your business collects sales tax or has employees in Indiana, you must register with the Indiana DOR through the INTIME portal. You’ll receive your Indiana Tax ID upon successful registration.
Indiana Tax ID vs. Federal EIN
It’s important to note that your Indiana Tax ID is not the same as your federal EIN:
| Identifier | Issued By | Purpose |
|---|---|---|
| EIN (Employer ID) | IRS | Federal tax reporting, payroll |
| Indiana Tax ID Number | Indiana DOR | State taxes, sales tax, withholding |
Final Thoughts
So, how do I find my Indiana tax ID number? You can locate it on your RRMC, past tax filings, the INTIME portal, or by calling the Indiana Department of Revenue. If you’re just starting a business, make sure you register to receive this important ID for state tax compliance.
