Sales Tax Nexus Analysis and Monitoring
Get real-time visibility into where threshold movement creates registration and filing obligations.
- Track sales tax nexus across states
- Know when registration is needed
- Reduce surprise compliance risk
Sales Tax Automation
Sales tax filing, handled for you.
Automate sales tax registrations, nexus monitoring, connected reporting, and recurring filings across the channels where your business sells. File uploads still work when needed, but the product is built around connected operational workflows.
What AtomicTax Covers
Built for operators managing sales tax across stores, marketplaces, subscriptions, and multi-state growth.
- Sales tax nexus analysis and monitoring
- State sales tax registration workflows
- Sales tax reporting and filing
- Connected data sources and store integrations
- All U.S. states plus marketplace-aware workflows
- Designed for ecommerce and SaaS finance operators
Nexus monitoringTrack exposure as state activity changes.
IntegrationsShopify, Amazon, WooCommerce, Stripe, Square, APIs, and more.
RegistrationsStart state accounts without manually navigating every portal.
Reporting & filingTurn connected source data into clean tax returns.
Multi-state readyBuilt for businesses selling across jurisdictions.
Products
Let us handle your sales tax so you can focus on growing the business.
AtomicTax brings the core operational pieces together: monitor nexus, connect channel data, register states, and stay on top of filing and reporting.
Wide Range of Easy Integration Options
Connect stores, marketplaces, billing platforms, and APIs so reporting does not rely on manual exports alone.
- Popular ecommerce and SaaS systems
- Marketplace-aware data handling
- 100s+ supported sources
Sales Tax Filing and Reporting
Review taxable sales, collected tax, and filing-ready numbers across the states where you operate.
- Centralized return preparation
- Reporting built around your sales channels
- Cleaner multi-state workflow
State Sales Tax Registration
Handle state onboarding without rebuilding the registration process from scratch every time a new obligation appears.
- Registration workflow support
- State-by-state handling
- Built to pair with nexus monitoring
Why Teams Switch
Sales tax operations get messy fast when growth adds states, channels, and products.
1
Data comes from everywhere
Orders, subscriptions, marketplaces, refunds, and channel adjustments rarely arrive in one clean tax-ready view.
2
Nexus shifts over time
Revenue growth and geographic concentration create obligations that are easy to miss until a notice lands.
3
Registration and filing stay manual
State portals, due dates, and workflow differences stack up quickly across multiple jurisdictions.
4
AtomicTax gives you one operating layer
Track nexus, prepare filings, register states, and keep reporting tied back to the systems where your sales happen.
Integrations
Connect the systems you already use.
AtomicTax supports platforms across ecommerce, marketplaces, billing, and custom source systems so your team is not rebuilding tax data pipelines by hand.
Shopify
Amazon
WooCommerce
BigCommerce
Stripe
Square
Files when needed
100s+ APIs
StorefrontsShopify, WooCommerce, BigCommerce, Wix
MarketplacesAmazon, marketplace exports, facilitator-aware reporting
BillingStripe and subscription workflows
Custom dataAPI-connected sources first, with file uploads as fallback
Online Sellers
Simple sales tax pricing.
$45per state filing
$99 per state registration. No platform fee for sellers.
- Pay only when you file
- Connected stores, marketplaces, billing systems, or API-fed data
- Filing summary prepared for review
- Filing confirmation stored
Accountants: $99/month for 25 clients, then pay per filing or registration.
Solutions
Different tax problems need different operating workflows.
AtomicTax serves online businesses that need a cleaner way to manage sales tax across direct ecommerce sales, subscriptions, marketplaces, and multi-state growth.
Ecommerce sales tax software
SaaS sales tax software
Marketplace-aware workflows
Multi-state compliance
Resources
Use the guides when you need clarity, not more tax jargon.
The live site built up a strong state-tax blog footprint. We’re preserving that route structure and rebuilding it into a cleaner static resource system.
- State-by-state sales tax guide
- Registration and filing guides
- Calculator and comparison content
- Blog paths preserved for migration
2024 US Sales Tax Guide
State-by-state overview of nexus, registration, filing cadence, and compliance basics.
Sales Tax Calculator
Lookup and estimation workflows for quick rate checks and operator research.
Economic Nexus Threshold Guide
Reference content for when and where nexus starts to become operationally relevant.
Get Started
Talk through your sales tax workflow with AtomicTax.
See how nexus monitoring, registrations, integrations, and filings can fit into one cleaner operating system.