Aeion Tax for US Multi-State Sales Tax
Since the Supreme Court's Wayfair decision (2018), every US e-commerce business is potentially liable for sales tax in all 50 states based on "economic nexus" — typically $100K in sales OR 200 transactions per state per year. Aeion Tax computes sales tax locally (zero per-calculation fees), supports product tax classes + exemption certificates, generates per-state filing reports, and gives you the per-state sales/transaction totals you need to watch your own nexus exposure. Walkthrough below.
The Wayfair Sales Tax Problem
`
How Aeion Tax Handles Multi-State Sales Tax
`
Nexus Tracking — Watching Your Own Exposure
Being honest: Aeion Tax doesn't run an automated nexus-monitoring service with threshold alerts or auto-registration. What it gives you is the raw data you need to watch your own exposure and act on it — the analytics endpoints (/tax/analytics/overview and /tax/analytics/by-jurisdiction) surface tax collected and transaction counts grouped by state, pulled straight from your live rate/transaction data.
Per-State Filing Workflow
`
Product Tax Class Edge Cases (US-Specific)
`
Exemption Certificate Management
`
When to Use Aeion Tax vs External (Avalara / TaxJar)
`
FAQ
Aeion ships pre-seeded base US state rates plus a product-tax-class engine for per-state/per-category overrides. Accuracy depends on keeping those rate tables current — via the rate-import API/admin UI, or by enabling an optional live-rate-lookup fallback provider (API Ninjas, ZipTax, TaxJar, or Avalara) for real-time verification. For complex edge cases, the hybrid (local + live-provider) mode is the recommended setup.
Aeion doesn't run automated threshold alerting today — you track your per-state sales/transaction totals via the tax analytics dashboard and compare them yourself against each state's published threshold. Once you decide to register, you register with the state DOR yourself, then configure/enable that state's rates in Aeion and add it to your filing cadence.
Aeion's analytics show your historical sales by jurisdiction, which helps you reconstruct when you likely crossed a threshold. If you have back-tax exposure: consult a CPA. Most states offer voluntary disclosure agreements (VDA) with reduced penalties.
Aeion generates the per-state filing report (PDF/CSV); you, your CPA, or a third-party e-filing service handle submission. Budget ~10-30 min per state per filing period for review + submission.
No — Aeion Tax doesn't submit returns or remittance to state tax authorities. It generates the filing-ready report (PDF/CSV); submission is manual, via your CPA, or via a third-party e-filing service.
If you sell on Amazon/eBay/Etsy: those marketplaces collect + remit tax on your behalf in many states. Aeion separately tracks: direct sales (you collect) vs marketplace sales (they collect). Avoid double-collecting.
Drop-ship rules are complex. Aeion handles standard scenarios. For exotic drop-ship (3-state transactions with reseller certificates), may need CPA consultation.
Aeion's platform-wide audit trail logs tax-related actions (rate changes, exemption verifications, etc.), and the analytics endpoints let you export tax-collected and transaction data by jurisdiction for a given period.
Aeion handles state + county + city + special districts. Postal code matching identifies all applicable jurisdictions. Compound tax (city on county on state) computed correctly.
Reverse tax on returns. Filing reports include net (sales minus returns). Aeion handles partial returns + adjustments.
You (or your CPA) update the affected rate/class tables via the rate-import API or admin UI. If you'd rather not track legislative changes yourself, enable a live-rate-lookup fallback provider for real-time verification on top of your local tables.