Audit protection in 25 states

Sales tax audit protection

Avalara is a Certified Service Provider (CSP) in 24 Streamlined Sales Tax states and Pennsylvania. As such, Avalara meets the rigorous standards set forth by SST and Pennsylvania for data processing and management of sales tax information. That means your tax compliance is managed with the highest level of accuracy.

By using SST-certified technology, your business gets both audit protection and the benefits of a fully automated solution. Our services are quick and easy to use and keep your business compliant with state and local sales tax regulatory changes.

How it works

CSP programs grew from state and local efforts to simplify and reduce the costs of sales tax compliance for qualifying businesses. Participation in a CSP program is voluntary for businesses and states. When you sign up for Avalara AvaTax, we work with you to determine if you qualify for the program and help you register in participating states. 

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Participating states

The active members of SST are: Arkansas, Georgia, Indiana, Iowa, Kansas, Kentucky, Michigan, Minnesota, Nebraska, Nevada, New Jersey, North Carolina, North Dakota, Ohio, Oklahoma, Pennsylvania,* Rhode Island, South Dakota, Tennessee, Utah, Vermont, Washington, West Virginia, Wisconsin, and Wyoming.

*Pennsylvania runs independently of SST through a similar state-run program.

Full member states
Full member states
Associate member states (flex to full)
Associate member states (flex to full)
Advisory states (not conforming)
Advisory states (not conforming)
Non-sales tax states
Non-sales tax states
Project states (not advisory)
Project states (not advisory)
Non-participating state
Non-participating state

Should I register right away?


The SST program makes more sense for some businesses than others, depending on sales volume in participating states and other factors. Avalara can help you determine if it's right for you and assist with the registration process.


Why use Avalara

No-cost sales tax services
No-cost sales tax services

As a CSP, Avalara provides free sales tax calculations, preparation, and filing in all the states where you qualify as an SST volunteer seller.

Help with new sales tax nexus laws
Help with new sales tax nexus laws

Registering and filing in multiple states where you have new tax obligations is easier on your business when you partner with a CSP. Avalara can help you determine where you’ve triggered economic nexus and provide assistance with registering and filing in new states.

Easy SST registration
Easy SST registration

We’ll register your business with participating SST states at no cost. Previously registering to collect sales tax in a state doesn’t preclude you from taking advantage of SST in that state.

Unlimited tax calculations
Unlimited tax calculations

Avalara will apply SST-based rates and rules to applicable transactions to deliver real-time sales tax calculations to your shopping cart — at no cost in the states where you qualify as an SST volunteer seller.

Audit relief
Audit relief

Get Avalara’s help if you’re audited in the states where you qualify as an SST volunteer seller. We’ll work with state auditors on your behalf.

One of the few certified providers
One of the few certified providers

Most automated tax solutions are not state-certified service providers. Partnering with Avalara improves tax compliance and reduces costs.

Sales tax solutions for all businesses


Even if you don’t qualify as an SST volunteer seller in all states, you can still lessen the burden of sales tax compliance with affordable solutions from Avalara.

Calculate sales tax

Real-time sales tax calculations flow directly from a powerful tax engine to your shopping cart or invoicing system in nanoseconds.

File sales tax

You'll barely lift a finger as Avalara tallies what you owe in the jurisdictions you designate, prepares and files your returns, and remits payments for you.

Manage tax compliance documents

Collect, store, and renew tax documents in the cloud. Our easy-to-use solution syncs with other tax software to apply exemptions at checkout.

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