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Sales Tax Compliance Services for Multi-State Businesses | Sales Tax Solutions

When it comes to ecommerce compliance, you want to make sure all your business’s sales tax reports, returns and registrations are in order. It’s a complex job and should only be handled by trained and experienced tax accountant professionals such as the team at SalesTaxSolutions.US. We are a top sales tax compliance company helping small to medium-sized ecommerce businesses with sales tax and use laws.
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Multi-state sales tax compliance

Sales Tax Compliance Services That Keep You Audit-Ready in Every State

Full-service sales tax compliance for growing B2B companies — nexus monitoring, registration, filing, and audit-ready records across all 50 states.

Sales tax compliance stops being simple the moment you cross a state line. Every state sets its own nexus thresholds, filing frequencies, taxability rules, and due dates — and they change constantly. For a growing B2B company, one missed registration or late return can turn into penalties, interest, and an audit that costs far more than staying compliant ever would.

Our sales tax compliance service takes the entire obligation off your plate. We monitor where you have nexus, register you in the states that require it, file every return on time, and keep clean, audit-ready records so you are never caught off guard. You get one team accountable for all 50 states instead of a patchwork of deadlines your finance team has to track.

Scope

What our sales tax compliance service covers

  • Nexus monitoring — we track your economic and physical nexus footprint as your sales grow, so you register before you are exposed, not after.
  • Multi-state registration — we handle permits and account setup in every state where you have an obligation.
  • Return preparation & filing — monthly, quarterly, and annual returns filed on time, every jurisdiction, with remittance handled.
  • Notice & audit response — when a state sends a notice, we respond. If you are audited, we defend the return.
  • Audit-ready recordkeeping — every filing documented, so a review is a formality, not a fire drill.
Fit

Who we work with

We specialize in B2B companies, SaaS, and e-commerce sellers that have outgrown DIY tools and in-house spreadsheets — typically businesses filing across 5–40+ states. If sales tax has become a monthly source of stress, that is exactly the problem we remove.

Software vs. service

Why outsource sales tax compliance instead of software alone

Software calculates rates; it does not take responsibility for your compliance. Filings still need review, notices still need answers, and registrations still need to be filed correctly the first time. We combine the automation with a team that owns the outcome — so the obligation is genuinely handled, not just partially automated.

FAQ

Sales tax compliance services — FAQ

What are sales tax compliance services?

Ongoing management of your full sales tax obligation — nexus tracking, registration, return filing, and audit support — so your business stays compliant in every state without managing it internally.

How much do sales tax compliance services cost?

Pricing scales with the number of states and filing frequency. See our pricing for the model, or request a custom quote based on your footprint.

Do I still need sales tax software?

Software helps with calculation, but it does not file, respond to notices, or take responsibility for accuracy. Our service covers the parts software leaves to you.

Get a free sales tax compliance review

Tell us where you sell and we’ll show you exactly what it takes to be compliant — and how we take it off your plate.

Get a free compliance review

Related: Nexus determination · Sales tax registration · Filing returns · Audit help · Pricing

Popular Seller Platforms

Our Clients Sell On

INVOICING SOFTWARE

Don't see the platform or invoicing system you use?

That's okay! We work with any sales data. Every business has unique needs and a unique system to go with that. No need to change your system just to collect and remit sales tax. We'll work with what you have. 

Quick FAQs

Here are some answers to Frequently Asked Questions.

What is the filing deadline?

Each jurisdiction has different deadlines. Some returns are due monthly, quarterly, semi-annualy, or annually. 

Can I get an extension?

Some states do offer extensions for returns, but not all. Depending on your situation you may qualify for an installment plan. 

What if I don't know where I need to file?

We can help you figure it out. Send us a message or give us a call to get started.

I received a delinquency notice from a state. What should I do?

Depending on the notice, you may need to file back returns with that state. We offer notice handling services, contact us to get started. 

What if I don't want to eFile my returns?

Most states require electronic filing now. It is the most convenient and fastest way to file. 

Can I file my return myself?

Our services are offered individually so you may choose to have us complete a nexus determination and register accounts, but not file returns. That is ultimately up to you. We understand each business has different resources and business needs. We’ll work with you to create a custom plan to meet those needs. 

What do I need to get started?

To get started you will need to send us a message detailing your business needs. After that, your tax preparer will walk you through the next steps.

Can I setup a meeting with my tax preparer?

Absolutely! Meetings are included with our services. We can do video meetings or phone calls, whichever is most convenient to you.

Reach out

Contact us to create your custom plan

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(888) 544-7730

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