Step 1
Nexus analysis
Licensed Enrolled Agents - Nationwide Virtual Service
Sales tax compliance services for small businesses
Most small business owners don't find out they owe sales taxes in three states until a notice lands from a state revenue department. After South Dakota v. Wayfair in 2018, economic nexus applies in most states at $100,000 in sales or 200 transactions per year. ProTax USA handles registration, multi-state filing, nexus analysis, and Voluntary Disclosure Agreements for businesses already behind. Flat monthly pricing, no surprises. Book online or call now.
Compliance Support
What are sales tax compliance services for small businesses?
Sales tax rules are different in every state, and most small business owners don't know how many states they're required to file in. ProTax USA starts with a nexus review, looking at where you have employees, inventory, warehouse space, and where your online sales are shipping. Multi-state sellers often discover they have sales tax nexus in 3 to 10 states without realizing it.
45 states plus Washington D.C. have sales taxes. Five don't: Oregon, Montana, New Hampshire, Delaware, and Alaska. But rates inside those 45 states vary widely. California's base rate is 7.25%. Texas is 6.25%. New York starts at 4% state-level but hits 8.875% with county-level add-ons in some areas. ProTax USA tracks the correct combined rate for each of the tax jurisdictions where you're making sales, not just the state base rate.
ProTax USA handles registration in new states, monthly or quarterly sales tax returns, rate updates when local rates change, and nexus monitoring as your sales grow. If you've been selling in states without filing, ProTax USA works through Voluntary Disclosure Agreement programs to reduce or eliminate penalties on back taxes. Call or book online today to find out where you actually owe.
How It Works
How does ProTax USA handle sales tax filing and compliance?
ProTax USA runs sales and use tax compliance in three phases. Most new clients go from zero to fully registered and filing within 30 days.
Nexus analysis and registration: ProTax USA reviews your sales data by state, identifies where you've crossed the $100,000 or 200-transaction economic nexus threshold, and handles state registration in each applicable jurisdiction. Physical nexus from employees or inventory gets flagged too, not just economic triggers.
Rate setup and filing schedule: ProTax USA maps your products or services to the correct taxability rules in each state, since not everything is taxable everywhere, sets up collection through your e-commerce or POS system, and puts each state on its required filing frequency, monthly, quarterly, or annual.
Ongoing filing and reconciliation: ProTax USA prepares and files sales and use tax returns in each state on schedule, reconciles collected tax against reported amounts, and handles any state notices or audit requests. Nothing slips through the cracks. If you've been operating in states without filing, ProTax USA evaluates whether a VDA makes sense before registration, since voluntary disclosure often caps lookback periods at 3 years and waives penalties entirely. Call or book online today.
Step 2
State registration
Step 3
Rate setup
Step 4
Filing calendar
Step 5
VDA review
Why It Matters
Why hire ProTax USA for sales tax consulting instead of software?
Sales tax software automates calculations, but it doesn't analyze your sales tax exposure, file returns in new states, respond to audit requests, or negotiate with a state revenue department. And if the software miscalculates taxability for your specific product category in a specific state, you're the one who owes the back taxes and penalties. ProTax USA has accountants who specialize in state and local tax, not algorithms that stop at checkout.
The penalty exposure is real. Most states charge between 5% and 25% of tax due for late returns, and some states assess that per return. A business that's been selling into California for three years without filing is looking at significant sales tax liabilities before penalties even start. ProTax USA has helped businesses resolve multi-state tax liabilities through VDA programs that limit the lookback period and reduce or waive penalties entirely, covering sales tax outsourcing from start to resolution.
ProTax USA also keeps up with rate changes and tax laws across all 45 states. That's a moving target. Local jurisdictions change rates, product taxability rules shift, and new states adopt economic nexus thresholds regularly. Staying current is part of what ProTax USA does, not something you have to track yourself. Book online or call now.
Sales tax software
ProTax consulting
Calculations
Automated
Reviewed
Registrations
Limited
Handled
Audit response
On you
Represented
Back taxes
Not solved
VDA path
Pricing Clarity
How much do sales and use tax compliance services cost?
ProTax USA pricing for sales tax compliance services is based on how many states you file in. Most small businesses land in one of two tiers: $99 per month for 1 to 3 states and $199 per month for 4 to 10 states. Both tiers include nexus monitoring, return preparation, state filing, and handling of routine state notices, so you can outsource the whole thing and stop worrying about deadlines.
Businesses filing in more than 10 states get a custom quote. High-volume e-commerce sellers with complex product taxability questions, like digital goods, software, or food items with state-specific rules, also get custom pricing since the analysis is deeper. ProTax USA gives you the quote after the nexus review, so you know your exact tax obligations and where you owe before you commit to anything.
If you need back-year tax return filings or a Voluntary Disclosure Agreement negotiated, that's a separate one-time project fee. ProTax USA scopes that work after reviewing your sales history and the states involved. In almost every case, the cost of cleaning up the past through sales tax outsourcing is less than what the states would assess if they find you first. Call or book online today to start with a nexus review.
1 to 3 states
4 to 10 states
10+ states
VDA cleanup
Related ProTax USA Services
Explore more ways we can help
Small business accountant for small business owners
ProTax USA offers small business accounting services, bookkeeping, and full-service tax solutions. Your trusted partner for business success.
Small business tax preparation services
Expert tax preparation for your small business. From tax filing to comprehensive services, get the preparation you need for your business taxes.
Small business tax planning services
Maximize savings with expert small business EA tax support. Our business tax planning services offer comprehensive solutions for your tax services needs.
Small business bookkeeping and tax services
Expert bookkeeping & tax services for small businesses. Streamline your finances with tailored bookkeeping services, tax filing, and business taxes.
Small company payroll services
ProTax USA handles small business payroll, EFTPS deposits, quarterly 941 filings, and year-end W-2 preparation. Flat monthly pricing, no surprise fees. Book a call today.
FAQ
Common questions about sales tax compliance services
Nexus
States
Back taxes
Penalties
Use tax
Filing scope
Notices
E-commerce
Nexus What is economic nexus and does it apply to my business?
Economic nexus means a state can require you to collect and remit sales tax even with no physical presence there. After South Dakota v. Wayfair in 2018, most states set the threshold at $100,000 in sales or 200 transactions per year. ProTax USA runs a nexus review to identify which states you've already crossed and what your sales tax obligations actually are.
States Which states don't have sales taxes?
Five states have no sales taxes: Oregon, Montana, New Hampshire, Delaware, and Alaska. If all your sales ship to those states, you have no tax obligation there. But most small businesses also sell into California, Texas, Florida, or New York, and each of those has different rates, compliance requirements, and filing deadlines that ProTax USA tracks for you.
Back taxes What is a Voluntary Disclosure Agreement and should I use one?
A VDA is a program most states offer to businesses that come forward before they're audited. In exchange for registering and paying back taxes voluntarily, the state typically limits how far back they look, often 3 years, and waives or reduces penalties. ProTax USA evaluates whether a VDA is right for you based on your sales history and the states involved.
Penalties How much can I owe in penalties for late sales tax returns?
State penalties on sales tax returns typically run from 5% to 25% of the tax due per return, plus interest in many states. A business that hasn't filed in California for two years is looking at back taxes plus penalties on each unfiled return. ProTax USA estimates total sales tax exposure before deciding whether to pursue a VDA or just register and file going forward.
Use tax Do I owe use taxes if I buy goods from out-of-state vendors?
Yes, use taxes apply when you buy taxable goods from a vendor that didn't collect sales taxes and you use those goods in a state that imposes them. Use taxes mirror the sales tax rate in your state and are a common gap for small businesses buying equipment or supplies online. ProTax USA includes use tax reporting in your compliance work so nothing gets missed.
Filing scope How many states do most small businesses end up filing in?
Multi-state sellers, especially e-commerce businesses, often discover they have nexus in 3 to 10 states after ProTax USA runs the review. Many didn't realize that crossing the 200-transaction threshold creates a tax obligation even if the dollar amount is low. ProTax USA identifies all of them in one nexus analysis and sets up the right filing schedule for each.
Notices Can ProTax USA help if I've already received a sales tax notice from a state?
Yes. ProTax USA responds to state notices, audits, and demand letters regularly. The response window is usually 30 to 60 days, so don't sit on it. ProTax USA reviews the notice, calculates what's actually owed versus what the state claims, and responds on your behalf. In many cases the amount can be reduced through proper tax management and documentation.
E-commerce Does ProTax USA handle sales tax for online stores and e-commerce sellers?
Yes. ProTax USA works with Shopify, Amazon, Etsy, WooCommerce, and other platform sellers. Each platform has different reporting exports, and some collect tax on behalf of sellers in certain states under marketplace facilitator laws. ProTax USA sorts out which states you still need to file in separately versus where the platform already handles sales and use tax remittance for you.