Each state has its own. We handle them all.
Sales tax permit
Required to collect sales tax. Triggered by physical or economic nexus (Wayfair).
Employer withholding
Required to withhold + remit state income tax. Triggered by hiring an employee resident in the state.
Unemployment insurance
Required to pay UI tax. Triggered by hiring; per-state rate based on prior claims.
Workers comp
Required to carry workers comp insurance. State-mandated for any employee in most states.
Identify nexus. Register every required ID.
Identify nexus
Physical (office, warehouse) · employee resident · revenue thresholds (Wayfair).
Pick required IDs
Per-state: sales tax · withholding · UI · WC. We surface what each state requires.
We register
State agency applications submitted. Each ID issued by the relevant authority.
Stored in your BOS
Each ID + renewal cadence tracked in your Compliance Calendar. Sales-tax filing reminders.
Common questions.
What is a state tax ID?
A state tax ID is an identifier a state issues to your business for state tax purposes, such as collecting sales tax or handling payroll withholding, and it is separate from your federal EIN. Many businesses need one in addition to the EIN. We flag when you need one and help you register.
Do I need a state tax ID?
Often yes if you collect sales tax, have employees subject to state withholding, or owe certain state taxes, so it depends on your activities and state. We flag whether your business needs a state tax registration so you obtain it when your operations actually require it.
How is a state tax ID different from an EIN?
An EIN is a federal tax ID from the IRS, while a state tax ID is issued by a state for state taxes like sales or payroll, so they serve different levels of government. We flag which numbers your business needs so you have the right identifiers, federal and state.
When do I need to register for a state tax ID?
Typically before you start collecting sales tax or running payroll in a state, since the registration authorizes those activities, so timing tracks when you begin them. We flag the registration so you have your state tax ID in place before you need to collect or withhold.
Do I need a state tax ID in multiple states?
Possibly: if you have sales tax nexus or employees in multiple states, you may need to register in each, since state tax IDs are state-specific. We flag where your activities require registration so you are covered in every state where you owe state taxes.
What is a sales tax permit?
A sales tax permit is a state registration, often tied to a state tax ID, that authorizes you to collect and remit sales tax, required before you make taxable sales in a state. We flag whether you need one and handle the registration so you can collect sales tax lawfully.
Do I need a state tax ID for payroll?
Often yes: running payroll usually requires state withholding and unemployment registrations, which involve state tax identifiers, so hiring in a state triggers them. We flag the payroll-related registrations so your hiring is set up compliantly in each state.
How do I register for a state tax ID?
You register with the relevant state tax agency for the specific taxes that apply, sales, payroll, or others, and we handle the registration for the states and taxes your business needs. We flag which registrations apply and complete them so your state tax setup is correct.
Can File.Business help me get a state tax ID?
Yes: we flag which state tax registrations your business needs, sales tax, payroll, or others, and handle the registrations in each relevant state, so you have the state tax IDs required to collect tax and run payroll compliantly. See sales tax registration.