Your Minnesota Tax ID is a seven-digit number the Minnesota Department of Revenue (DOR) assigned to your business when you registered, and the quickest way to find your Minnesota Tax ID number is to pull it off a document the DOR has already sent you: your original registration confirmation letter, a previously filed state return, or the account dashboard in e-Services.1Minnesota Department of Revenue. Minnesota Tax ID Requirements The number is printed on nearly every piece of correspondence the department has issued to you, so a short search through your business files usually settles it in a few minutes. If nothing turns up, you can retrieve it through the DOR’s online portal or by calling Business Registration directly.
Check Your Business Records First
Before logging in anywhere or making a call, look at the paper and email you already have. The seven-digit Tax ID appears on:
- The registration confirmation letter the DOR sent when your business first registered. It contains the Tax ID and a temporary e-Services password, and it’s the most reliable single source.
- Your seller’s permit, if your business collects sales tax. The same number may appear elsewhere as a “sales tax exempt number” or “resale exemption number.”2Minnesota Department of Employment and Economic Development. Tax Identification Numbers
- Previously filed state returns, including the Minnesota corporate franchise return (Form M4), withholding returns, and sales tax filings. The Tax ID is near the top of each form.
- Billing notices, audit letters, and any other DOR correspondence, where it sits in the header or account summary alongside your legal business name.
- Completed Form ST3 exemption certificates you’ve provided to suppliers. The Tax ID goes in the purchaser identification field.3Minnesota Department of Revenue. Form ST3, Certificate of Exemption
Any one of these gives you the number without a login or a phone call. Confirm it against a second document if you can, because a transposed digit will bounce a return.
Look It Up in E-Services
The DOR’s e-Services portal is where Minnesota businesses file returns, pay tax, and manage their accounts. Your Tax ID shows up on the dashboard the moment you log in, listed under your business name as the “Account ID,” and you can also see it under the profile or account management pages.
If you already have a username and password, that’s the whole process: log in and read it off the screen.
If You’ve Never Set Up E-Services
Businesses that registered online are already enrolled in e-Services and can sign in with the credentials they created at registration. Businesses that registered by phone or mail need the temporary password from the original confirmation letter to create an account. On the e-Services site, use the “New to e-Services?” option to create a username, then link your Tax ID to the new login using that temporary password.4Minnesota Department of Revenue. e-Services Information
If You Can’t Find the Confirmation Letter
Without the letter, self-service through e-Services stalls, because the registration flow requires the temporary password it contains. There’s no way to talk the portal past that step. At this point, call the DOR.
Call the Department of Revenue
When your records are empty and the portal won’t let you in, the Business Registration line is the direct route.
- Business Registration: 651-282-5225, or 1-800-657-3605 toll-free
- Sales and Use Tax questions: 651-296-6181, or 1-800-657-3777 toll-free5Minnesota Department of Revenue. Sales and Use Tax
- Hours: 8:00 a.m. to 4:30 p.m. Central Time, Monday through Friday6Minnesota Department of Revenue. Contact Us
The agent will verify your identity before releasing anything. Have ready your legal business name, the physical address the DOR has on file, your federal Employer Identification Number (or your Social Security Number if you’re a sole proprietor), and the name and title of an authorized person on the account. A recent federal return or your Secretary of State filing helps, because every detail has to match the department’s records exactly.
If you have an e-Services account but simply can’t locate the Tax ID on the dashboard, secure messaging inside the portal is another option. Phone calls generally resolve faster, especially during filing season when message response times stretch out.
Letting an Accountant Retrieve It for You
If you’d rather have your accountant or tax preparer pull the number, there are two paths.
For online access alone, no Power of Attorney form is needed. Your accountant requests third-party access through e-Services, and you approve it from your own account.7Minnesota Department of Revenue. Form REV184i, Individual or Sole Proprietor Power of Attorney That’s usually enough if the goal is just to look up account information.
For broader authority, including calling or writing the DOR on your behalf, submit Form REV184 (Power of Attorney). It lets you grant either limited authority (specific tax types or periods) or full authority across all your tax accounts. The appointee must be eligible to practice before the department, which rules out anyone suspended from practicing as an attorney or accountant, barred from IRS practice, or currently employed by the DOR. The authorization stays in effect until you revoke it, it expires, or you pass away.
Don’t Confuse It With Your Federal EIN
If you’re rummaging through files and pull out a nine-digit number, that’s your federal Employer Identification Number, issued by the IRS. Your Minnesota Tax ID is a separate seven-digit number issued by the DOR, and the two are not interchangeable.1Minnesota Department of Revenue. Minnesota Tax ID Requirements The DOR uses your federal EIN during state registration for identity verification, which is where the confusion typically starts, but the two numbers live in completely separate systems at different agencies. Digit count is the fastest way to tell them apart: seven for the state, nine for the federal.
The same logic applies to your Unemployment Insurance Employer Account Number, which comes from the Minnesota Department of Employment and Economic Development, not the DOR.2Minnesota Department of Employment and Economic Development. Tax Identification Numbers If you’re withholding Minnesota income tax, your DOR-issued Tax ID doubles as your Minnesota Employer ID for tax purposes, but the unemployment account number is a different number from a different agency.