# Review US Sales Tax Nexus

E-commerce sellers must assess state sales tax obligations across sales channels and inventory locations. This guide structures nexus reviews and registration planning with manual verification.

## Install

```bash
npx skillstore add nexaiguy/nex-sales-tax-nexus
```

## Metadata

- Status: approved
- Slug: nexaiguy-nex-sales-tax-nexus
- Version: 1.0
- Author version: 1.0
- Skillstore revision: r1
- Version status: invalid
- Tree hash: 6661953c50f3e5685925b873446bb0a2f2e033d692f0ac1b369d6984c85dc076
- Author: nexaiguy
- GitHub username: nexaiguy
- License: MIT
- Repository: https://github.com/nexaiguy/nex-ai-skills/tree/463aaff26593654193deb52f24d18e80ec21e323/skills/nex-sales-tax-nexus
- Ref: 3ddfdca559084abffbfdd188f2ba14b597dcfd9c
- Supported tools: Claude, Codex, Claude Code
- Audit status: complete
- Agent install advisory: allowed
- Manual install advisory: allowed
- Artifact signature: available
- Audit attestation: unavailable
- Human verification: not\_verified
- Risk factors: network
- Quality score: 77
- Quality tier: bronze
- Public page: https://skillstore.pages.dev/skills/nexaiguy-nex-sales-tax-nexus
- Manifest: https://skillstore.pages.dev/api/skills/nexaiguy-nex-sales-tax-nexus/manifest

## Capabilities

- Guides physical nexus review before economic nexus review, including Amazon FBA inventory considerations.
- Frames state threshold reference tables for verification against state Department of Revenue sources.
- Outlines registration planning and voluntary disclosure prioritization for historical exposure.
- Describes MTC and SST exemption certificate workflows for wholesale and B2B sales.
- Distinguishes marketplace-only sellers from sellers with direct and marketplace sales.

## Use Cases

- Review Direct Sales Expansion: Organize state sales and physical presence information before reviewing potential registration obligations.
- Assess Marketplace Inventory Exposure: Separate inventory locations from marketplace sales to prepare questions about physical nexus and marketplace facilitator rules.
- Plan Exemption Certificate Reviews: Outline certificate checks and state acceptance questions for MTC and SST resale documentation.

## Prompt Templates

### Start a Nexus Review

```
Use this guide to list the information needed for my first US sales tax nexus review. Separate physical presence from economic activity.
```

### Compare State Exposure

```
Review these state sales totals, reporting periods, channels, and inventory locations: [details]. Identify possible nexus triggers and state rules requiring current verification.
```

### Review Wholesale Exemptions

```
Outline a review workflow for MTC and SST certificates across these states: [states]. Separate completeness checks from state acceptance questions requiring authoritative confirmation.
```

### Prioritize Historical Exposure

```
Assess these historical sales, inventory locations, marketplace activities, and registrations: [details]. Prioritize potential exposure, verification tasks, and voluntary disclosure questions for a tax professional.
```

## Limitations

- Only SKILL.md is included; original package scripts, extension source, and templates are absent.
- Threshold claims require current state verification; no live data integration or automatic monitoring is included.
- The guide does not provide legal or tax advice or file registrations.
- Income tax and franchise tax nexus calculations are outside its scope.

## Best Practices

- Verify thresholds, measurement periods, and marketplace rules against current state Department of Revenue guidance.
- Collect inventory locations and physical presence dates before evaluating economic nexus.
- Have a qualified tax professional review historical exposure and voluntary disclosure options before acting.

## Anti Patterns

- Treating the guide as a current, authoritative database of state tax rules.
- Assuming marketplace tax collection eliminates every seller registration obligation.
- Expecting automatic filings, platform integrations, or certificate templates from this text-only package.

## Security Audit

- Audited at: 2026-11-02T11:34:40.926\+00:00
- Summary: All three static findings are false positives: the flagged URLs are attribution links, and the alleged reconnaissance is promotional footer text. No evidence found of malicious instructions, credential access, command execution, or data exfiltration in the reviewed file. This package contains a text guide, not the scripts or templates advertised for the original package.

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