1
Connect or upload your sales data
Use Shopify, Amazon, WooCommerce, BigCommerce, Wix, Etsy, eBay, Walmart Marketplace, Stripe, Square, PayPal, QuickBooks, Xero, NetSuite, CSV, Excel, PDF, or custom integrations.
Ecommerce Sales Tax Filing
Automated sales tax filing for ecommerce stores
AtomicTax helps online sellers file recurring sales tax returns, monitor nexus, manage state registrations, and keep confirmations organized.
$45per filing
Nexus monitoringas you grow
Flexible integrationspopular platforms and custom data flows
July filing queue
Ready for review
Standard filings18
Nexus alerts3
Confirmations42
Shopify GA return$45
Amazon TX return$45
WooCommerce FL return$45
Shopify
WooCommerce
Amazon
Custom API
The Problem
Sales tax gets messy fast when your store grows
You sell across platforms. States have different filing schedules. Reports do not always match portal requirements. Nexus thresholds can sneak up on you. AtomicTax gives ecommerce sellers a clearer way to manage filing work without rebuilding everything manually.
How It Works
From sales data to filed return in four steps
2
AtomicTax reviews your filing requirements
Organize state, period, filing frequency, sales source, and nexus monitoring in one workflow.
3
Approve your return
Review the filing packet clearly before the return is submitted.
4
We file and store confirmations
Keep filing history, state confirmations, and recurring filing tracking organized.
What You Manage
Sales tax compliance work, without the spreadsheet scramble
Source Support
Works with the sales data you already use
AtomicTax is focused on filing and compliance workflow, not generic checkout tax calculation. We support popular ecommerce, marketplace, payment, accounting, ERP, file upload, and custom integration workflows.
Shopify
WooCommerce
BigCommerce
Wix
Squarespace
Etsy
eBay
TikTok Shop
Stripe
Square
PayPal
QuickBooks
Xero
Also supported
Amazon, Walmart Marketplace, Magento, Adobe Commerce, NetSuite, CSV, Excel, PDF, and custom integrations.
Compliance Workflow
Built for sales tax workflows
AtomicTax helps keep filing work organized by state, period, due date, approval, and confirmation. Your team gets a clearer record of what was filed and when.
StateGA, TX, FL, CA
PeriodMonthly and quarterly
ApprovalReview before filing
ConfirmationStored by return
FAQ
Questions ecommerce sellers ask before registering
Does AtomicTax calculate sales tax at checkout?
AtomicTax is focused on sales tax filing, nexus monitoring, registration support, and compliance workflow. It works with the sales data your store already creates.
What platforms do you support?
AtomicTax supports popular ecommerce, marketplace, payment, accounting, and ERP sources including Shopify, Amazon, WooCommerce, BigCommerce, Wix, Squarespace, Magento, Adobe Commerce, Etsy, eBay, Walmart Marketplace, TikTok Shop, Stripe, Square, PayPal, QuickBooks, Xero, NetSuite, CSV, Excel, PDF, and custom integrations.
Do you file the returns?
Yes. AtomicTax helps prepare and file standard sales tax returns and stores confirmations.
Do you help with nexus?
Yes. AtomicTax helps monitor nexus exposure as your ecommerce store grows.
How much does filing cost?
Standard sales tax filings are $45 per filing.
Ready
Ready to make sales tax filing easier?
Register for AtomicTax and start organizing your ecommerce sales tax filings in one place.