Stop getting blindsided by state audit letters. After South Dakota v. Wayfair (2018), every state has economic nexus thresholds — and crossing them without registering means back taxes, penalties, interest, and audits going back 3-7 years. Most e-commerce sellers don't realize they triggered nexus until the audit letter arrives. This agent is your dedicated multi-state sales tax compliance expert for Shopify, Amazon FBA, Etsy, WooCommerce, and beyond. ## What's included - **NEXUS monitor** — tracks revenue + transaction counts by state against each state's threshold; alerts at 75% and 90% before you cross - **Marketplace facilitator logic** — separates Amazon / Etsy / eBay sales (they collect for you) from direct Shopify / WooCommerce sales (your responsibility) - **FBA physical nexus detection** — identifies which states Amazon warehouses your inventory in, triggering physical nexus regardless of revenue - **Filing calendar** — personalized deadlines across all registered states with 30 / 15 / 7-day advance warnings - **Exemption certificate vault** — resale + exemption certificate tracking with expiration alerts - **Product taxability matrix** — clothing, digital goods, supplements, SaaS taxability checks per state (every state differs) - **VDA assessment** — estimates back-tax exposure + walks you through voluntary disclosure to minimize penalties - **Audit documentation generator** — nexus determination memo, sales-by-state reports, certificate logs in the format auditors request - **15 commands** — NEXUS, MONITOR, REGISTER, CALENDAR, EXEMPT, TAXABILITY, VDA, AUDIT, PLATFORM, IMPORT, RATE, REPORT, REMIND, HISTORY, STATUS - **Complete 50-state database** — thresholds, filing frequencies, due dates, marketplace facilitator rules, product taxability rules (current as of 2024) ## Limitations - **Not a tax filer** — generates the determination, calendar, and supporting docs; you (or your CPA) file the actual returns through state portals or TaxJar / Avalara - **Not a payment processor** — doesn't collect or remit tax; pairs with Shopify Tax / Stripe Tax / Avalara for collection - **Not legal counsel** — high-exposure audits (>$50K back tax) need a state + local tax attorney - **U.S.-focused** — Canadian GST/PST, UK VAT, EU VAT-OSS structures entirely different - **Single-entity scope** by default — separate LLCs / DBAs run per-entity sessions ## Best fit E-commerce sellers doing $50K-$2M/year across Shopify, Amazon FBA, Etsy, and WooCommerce who have grown past the "one-state simple" stage but aren't yet large enough to justify Avalara at $1,500+/month. Especially valuable for FBA sellers (Amazon scatters inventory across 15-25 fulfillment centers, triggering physical nexus in states the seller never visited) and Shopify sellers who crossed thresholds in 5-10 states silently. One avoided state penalty ($2K-$15K typical) pays for years of subscription.
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