Sales Tax Nexus & Filing Optimizer
Analyze multi-state sales tax nexus and create compliant filing calendars
What You Can Do
You can analyze your clients' multi-state sales activities to determine nexus obligations across all 50 states, calculate whether economic and physical presence thresholds have been met, and generate prioritized filing calendars with specific deadlines and requirements for each state. This skill helps you eliminate guesswork around post-Wayfair nexus rules, identify overlooked registration requirements, and structure compliance workflows to prevent costly penalties and examination exposure.
Features
Evaluates physical presence, economic nexus, affiliate nexus, and marketplace facilitator rules against client-specific sales data
Identifies registration and filing requirements across all states with jurisdiction-specific rules
Creates prioritized compliance calendars with due dates, filing frequencies, and state-specific deadlines
Flags high-risk gaps and compliance exposures based on client business model and sales patterns
Applies state-specific revenue thresholds and lookback periods to determine current filing obligations
Evaluates eligibility for voluntary disclosure relief in non-filing states
Applies state-specific rules for marketplace facilitators, drop-shipping, and affiliate networks
Example Output
Example 1: Ecommerce Company Multi-State Analysis
States Requiring Registration:
- California (Physical presence + $334K economic nexus threshold met)
- Texas (Economic nexus: $500K threshold exceeded)
- Florida (Marketplace facilitator collecting on your behalf — no action required)
- New York (Economic nexus: $100K threshold exceeded)
Filing Calendar (Next 90 Days):
- January 20: California sales tax return due
- January 31: Texas franchise tax declaration due
- February 15: New York sales tax return due
- March 20: California estimated payment due
Audit Risk Flags:
- ⚠️ No Colorado registration despite $75K annual sales in 2024 (threshold: $100K — near trigger) ✓ Marketplace facilitator correctly handling Florida collections
Example 2: Affiliate Network Nexus Summary
Nexus Determination Results:
- 12 states with affiliate nexus triggered
- 8 states requiring immediate registration
- 4 states with optional registration (low compliance cost)
- 6 states with economic nexus thresholds not yet met
Priority Actions:
- Register in 8 required states within 30 days
- Monitor 6 threshold states quarterly
- Implement affiliate disclosure for 12 affiliate-nexus states
What's Included
- SKILL.md instruction file with nexus analysis methodology:
- Multi-state nexus checklist covering physical presence, economic nexus, affiliate, and marketplace facilitator rules:
- Filing calendar template (spreadsheet format) with state deadlines, frequencies, and payment due dates:
- Nexus threshold lookup table with current economic nexus thresholds and lookback periods by state:
- Audit risk assessment framework identifying high-risk compliance gaps and remediation steps:
Who It's For
- Tax accountants managing multi-state ecommerce and remote sales clients
- Accounting firms conducting sales tax compliance audits
- Tax advisors onboarding businesses with recent growth or geographic expansion
- Compliance specialists managing marketplace facilitator and affiliate networks
- In-house tax teams evaluating sales tax exposure across multiple jurisdictions
Best For
- Multi-state nexus determination and registration planning
- Sales tax compliance calendars and deadline management
- Voluntary disclosure relief eligibility analysis
- Ecommerce and marketplace sales tax compliance reviews
- Post-audit or examination preparation for multi-state businesses
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