Sales Tax Nexus & Obligation Analyzer
Identify sales tax nexus and filing obligations across 50 states and localities
What You Can Do
This skill helps you audit nexus comprehensively by analyzing physical presence rules, economic thresholds, affiliate connections, and marketplace facilitator statutes across all 50 states and relevant localities. You'll document nexus triggers specific to your client's business model—whether they're selling through marketplaces, using drop-shipping, hiring remote employees, or expanding operations. The result is an actionable filing calendar and remediation strategy that minimizes compliance gaps and protects against substantial back-tax assessments, penalties, and interest.
Features
Identifies nexus created by employees, offices, warehouses, inventory, and contractor relationships in each state
Determines sales dollar thresholds and transaction count triggers for each jurisdiction based on current client revenue
Flags exposure when selling through Amazon, eBay, Shopify, and other platforms that may report sales on client's behalf
Uncovers nexus created through related entities, shared services, or intercompany transactions
Creates a jurisdiction-by-jurisdiction compliance schedule with deadlines, filing methods, and required forms
Structures nexus findings for merger, acquisition, and audit defense scenarios with documented analysis trail
Prioritizes unfiled jurisdictions and recommends voluntary disclosure or protective filing approaches
Example Output
Example 1: E-Commerce Seller with Multiple Sales Channels
Client Profile: Sells widgets through own website, Amazon FBA, and eBay from warehouse in Texas
Nexus Analysis Output:
- Physical Presence Nexus: Texas (warehouse), states where inventory stored via FBA
- Marketplace Facilitator: Amazon and eBay report sales in all states where they operate; client has no filing obligation in those jurisdictions
- Economic Nexus: California ($600K threshold met), New York ($500K threshold exceeded), Florida ($100K threshold met)
- Filing Obligations: 12 states identified requiring sales tax returns; filing schedule shows quarterly deadlines for high-volume states, annual for others
Example 2: B2B Service Company with Remote Expansion
Client Profile: Consulting firm based in Massachusetts; hired remote employees in California, Texas, and Florida in past 18 months
Nexus Analysis Output:
- Physical Presence Nexus: Massachusetts (headquarters), California, Texas, Florida (through employee presence)
- Economic Nexus: Triggered in 8 additional states based on service revenue
- Affiliate Risk: No related entities identified
- Remediation: 10 unfiled states recommended for voluntary disclosure to minimize penalties; compliance calendar established for forward-going obligations
Example 3: Drop-Shipping Supplier
Client Profile: Drop-shipping fulfillment from suppliers in China; customer base across all 50 states
Nexus Analysis Output:
- Physical Presence: Only in state of incorporation
- Marketplace Facilitator: Platform (Shopify) handles reporting in participating states
- Economic Nexus: Triggered in 22 states based on $12M annual revenue threshold analysis
- Affiliate Nexus: Related entity in Kansas identified; triggers additional state obligations
- Action Items: 15 states require immediate filings; 7 states recommended for protective filing
What's Included
- SKILL.md instruction file: Complete methodology for nexus analysis and obligation mapping
- Nexus trigger checklist: Comprehensive framework covering physical presence, economic thresholds, affiliate relationships, and marketplace facilitator rules
- 50-state nexus summary matrix: Quick-reference table with current thresholds, filing frequencies, and recent law changes by jurisdiction
- Client intake questionnaire: Structured interview template capturing business model, sales channels, employee locations, and related entities
- Filing obligation prioritization worksheet: Tool for ranking unfiled jurisdictions by risk and recommending remediation sequencing
- Compliance calendar template: Jurisdiction-specific filing deadlines, forms, and payment schedule generator
Who It's For
- Tax accountants and CPA firms conducting nexus audits for multi-state clients
- Accounting managers planning sales tax compliance for clients with changing operations
- Tax compliance specialists handling new client onboarding and state-by-state obligation mapping
- Business advisors preparing nexus analysis for merger, acquisition, or due diligence processes
- In-house tax teams at e-commerce or marketplace businesses assessing filing obligations
Best For
- New client nexus baseline assessments and comprehensive nexus audits
- Annual compliance reviews when client operations expand, relocate, or change sales channels
- Marketplace seller and drop-shipping business obligation analysis
- Sales tax audit defense preparation and documentation
- Voluntary disclosure strategy planning and remediation prioritization
- Remote employee or contractor expansion impact assessments
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