Systems & Integrations

Connect the source data your sales tax workflow actually depends on.

AtomicTax supports connected data sources first so your team can run nexus, registrations, filing calendars, and recurring returns from cleaner automated inputs. If a system can expose data through an API or structured export, it can usually fit the workflow. File uploads remain available when a connected path is not ready.

100s+

Supported source systems, integrations, exports, and API-based workflows.

APIs + files

Connected storefronts, marketplaces, billing data, custom sources, and file-based fallback inputs.

1 workflow

Connected data flows directly into state review, filings, and recurring operations.

Why it matters

Your sales tax workflow is only as clean as the reporting input behind it.

Most filing problems start upstream. Reports arrive late, direct and marketplace sales are mixed together, the wrong period is exported, or the team is rebuilding the same manual mapping every month.

  • Reduce spreadsheet cleanup before filing review
  • Separate direct-channel and marketplace reporting more clearly
  • Normalize repeatable source data for recurring filing periods
  • Keep account owners, finance, and external firms on the same version of the numbers
Common source categories
Shopify
Amazon
WooCommerce
BigCommerce
Wix
Stripe
Square
Files when needed
APIs + custom data
Storefronts

Shopify, WooCommerce, BigCommerce, Wix, and similar storefronts.

Use storefront order, product, and tax exports as the basis for recurring state reporting and filing preparation.

Marketplaces

Amazon and marketplace-fed workflows.

Keep facilitator-handled and direct obligations cleaner so return prep does not collapse into one blended revenue number.

Billing

Stripe and subscription billing data.

Support recurring SaaS and billing-source reporting where filings depend on clean period alignment and tax breakdowns.

Fallback files

CSV, Excel, and PDF handoff workflows.

For teams not ready to connect systems directly, file-based inputs still fit the product. They are supported as a fallback path, not the center of the AtomicTax operating model.

APIs

Custom reporting layers and API-fed sources.

If your team already centralizes revenue, tax, or channel reporting elsewhere, AtomicTax can often work from that system instead of forcing a new export habit.

Accountants

Multi-client firms with mixed source systems.

Accounting teams can manage clients that each send different exports, billing feeds, or connected store data inside one filing workspace.

What connected really means

The goal is not “more integrations.” The goal is less monthly reconstruction work.

The value of integration is not just that data moves. It is that the same state, period, channel, and tax fields can be reused through nexus review, registration planning, filing packets, approvals, and recurring return preparation without the team rebuilding context from scratch each cycle.

See how it works Read the data source guide