Sales tax in every state where you owe
We work out where your business has to collect sales tax, register you for the permits and file every return, on each state's schedule. Marketplace sales stay separate from your own, and the numbers tie to your books. It's part of every monthly plan.
Updated November 2026
What do we handle for sales tax?
Sales tax gets complicated the moment you sell across state lines. Here's what comes off your plate.
Nexus review
Where you have to collect, checked again as your sales grow.
Permits
Registered in each state that needs one, before you start collecting.
Every return
Monthly, quarterly or yearly, on whatever schedule each state assigns.
Marketplace sales split out
Amazon, Etsy and Shopify sales kept apart from your own, so nothing's paid twice.
Tied to your books
Sales tax payable reconciled every month.
State letters handled
Read, explained and answered with a response for you to sign.
| State | Economic nexus starts at |
|---|---|
| California | $500,000 in sales into the state |
| New York | $500,000 in sales and more than 100 transactions |
| Florida | $100,000 in taxable sales |
| Pennsylvania | $100,000 in sales |
| Most other states | $100,000 in sales a year, and some also count orders |
Alaska, Delaware, Montana, New Hampshire and Oregon have no statewide sales tax, though some Alaska cities collect their own. Thresholds change, so we check the current rule for each state you sell into.
- The TaxJar or Avalara subscription itself
- Back filings for periods you already missed, often through a voluntary disclosure, quoted after review
- Taxability research for unusual products, quoted if it's a big project
- Setting rates inside your website or point of sale. We tell you what to set
How does sales tax filing work with us?
Most owners find out about nexus from a state letter. We'd rather you heard it from us.
Nexus check
Where you sell, how much and how many orders.
Register
Permits in the states where you owe.
Collect
We tell you which rates to turn on, and where.
File every period
Returns filed, confirmations in your portal.
How much does sales tax filing cost?
Priced by how many states you file in. It also comes inside every monthly plan.
One state
Where you have nexus
$75/mo
- Every return filed in your state
- Tied to your books
- A nexus check each quarter
A few states
2 or 3 states
$175/mo
- Everything in One state
- Permits where you need them
- Marketplace sales sorted out
Many states
4 to 6 states
$300/mo
- Everything in A few states
- TaxJar or Avalara managed
- Notices from states answered
Priced on top
- 7 or more states, quoted after a short call
- Back periods and voluntary disclosures, quoted after we look
Or bundle it
Every monthly plan includes sales tax filings for your home state.
Not sure which tier fits? We confirm it, and the fixed price, on a free call before any work starts.
Sales tax questions, answered.
Not sure whether you owe in a state? That's exactly what the first call is for.
Book a callSources: Streamlined Sales Tax Governing Board, California CDTFA
Free tools: Sales tax calculator, Economic nexus by state, States with no sales tax
What is sales tax nexus?
The connection with a state that makes you collect its sales tax. A store, warehouse or employee there creates it, and since the 2018 Wayfair decision, selling enough into a state can too, even if you've never been there.
I sell on Amazon or Etsy. Do I still need to file?
Marketplaces collect the tax on sales made through them in every sales tax state. Sales through your own website still need tax collected, and some states still expect you to register or report. We separate the two so you neither pay twice nor miss anything.
Are services and software taxable?
Sometimes. Most states tax goods and only some services, and software as a service is taxable in some states and not others. We check what you actually sell before you register anywhere.
What if I should have been collecting already?
It happens a lot to fast-growing online sellers. Most states run voluntary disclosure programs that can limit how far back you owe and waive penalties if you come forward first. We size your exposure, then help you decide.
Do I file if I collected nothing?
Usually yes. Once you have a permit, most states expect a return every period, and a missed zero return can still bring a penalty.
Tell us what's messy. We'll tell you what it takes.
Tell us what you need and get a fixed price before any work starts. No pressure and no contract.