How to Register for State Taxes

Step 1: Get Your Federal EIN First

Before registering with any state tax agency, get a federal Employer Identification Number from the IRS if you don't already have one. Nearly every state tax registration form asks for your EIN, so having it ready avoids a stalled application.

Step 2: Determine Whether You Need a Sales Tax Permit

If your business sells taxable goods or, in many states, certain services, you generally need to register for a sales tax permit with your state's Department of Revenue before making your first sale. For example, Texas requires a Sales and Use Tax Permit from the Comptroller of Public Accounts, while Florida requires a Certificate of Registration from the Department of Revenue. There's no fee to register for a sales tax permit in most states, but confirm this with your own state's revenue agency.

Step 3: Determine Whether You Need State Income Tax Withholding

If your state has a personal income tax and you plan to have employees, you typically register separately for state withholding tax, so you can remit the state income tax withheld from employee paychecks. States without a personal income tax, including Texas and Florida, have no withholding registration, though other registrations, like sales tax or unemployment insurance, can still apply.

Step 4: Check Whether Your State Combines Registrations

How many separate registrations you need depends on your state. California's Employment Development Department registers employers for both unemployment insurance and state income tax withholding in one place. New York uses a single combined form, Form NYS-100, filed with the Department of Labor, covering unemployment insurance, withholding, and wage reporting together. Other states split sales tax, income tax withholding, and unemployment insurance across separate agencies entirely, so check your own state's structure rather than assuming it matches another state's.

Step 5: Register for Employer Taxes if You'll Have Staff

If you plan to hire employees, you also register separately with your state's workforce or labor agency for unemployment insurance, a different registration from sales tax or income tax withholding. See how to register for state employer taxes for the agency-by-agency breakdown and deadlines, including Texas's 10-day window after becoming liable for the tax.

Step 6: Provide the Information Each Registration Asks For

Typical state tax registrations ask for your legal business name and EIN, your business structure, the date you started or expect to start selling or paying wages, and your business address. Some states also ask for your industry classification, since certain tax rates or exemptions depend on it.

Step 7: Receive Your State Tax Account Numbers

Once registered, the state issues an account number, separate from your federal EIN, for each registration, a sales tax permit number, a withholding account number, or both. You'll use these numbers on the state's own tax filings going forward.

Step 8: File on the Schedule Your State Assigns

After registering, most states assign a filing frequency, commonly monthly, quarterly, or annually, based on your expected sales or withholding volume. Confirm your assigned schedule rather than assuming it matches a different business's frequency, since filing late can trigger penalties even if the tax owed is small.

Register Before Your First Sale, Not After

Most states expect sales tax registration before you make a taxable sale, not after you realize you should have one. Confirm your state's specific timing requirement before you open rather than treating it as a later task.

Multi-State Businesses Register in Every State Where They Have a Presence

If you sell into other states or have a physical presence there, you may owe sales tax registration in those states too, separate from your home state. Economic nexus rules, which vary by state, can trigger a registration requirement even without a physical location in that state.

Some Services Are Taxable, Others Aren't

Whether your specific services are subject to sales tax depends entirely on your state; some tax very few services, while others tax many. Confirm your state's specific rules rather than assuming all services are treated the same way.

Keep State Tax Registration Separate From Your Formation Filing

It's a common and costly assumption that forming an LLC or corporation with the state automatically registers the business for sales or income tax. These are different agencies and different filings, even within the same state.

This Is Not Tax Advice

Sales tax rules, income tax withholding requirements, and filing frequencies vary by state and change over time. Talk to a tax professional or your state's Department of Revenue to confirm your specific requirements before you open.