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It is organized into three functional modules, each targeting a distinct area of tax compliance:\n\n---\n\n### Flux — Tax Filing\nHandles the submission of tax returns across three Nigerian tax types:\n\n- **VAT** (Value Added Tax) — single and batch filing via `/vat/filing/`\n- **WHT** (Withholding Tax) — single and batch filing via `/wht/filing/`\n- **CIT** (Companies Income Tax) — single and batch filing via `/cit/filing/`\n\nBatch filing endpoints return a `202 Accepted` response and support asynchronous job tracking via a **Get Job Status** endpoint (`GET /cit/filing/batch/:job_id/status`).\n\n---\n\n### Prism — Invoice Analysis\nSubmits invoices to the TaxStreem Prism engine for automated tax analysis. The engine evaluates line items and returns VAT status, tax insights, and compliance checks based on Nigerian tax rules.\n\n- **Single invoice analysis** — synchronous, real-time response\n- **Batch invoice analysis** — asynchronous, job-based processing with status polling\n\n---\n\n### Numen — Transaction Tax Classification\nClassifies financial transactions for tax purposes by analyzing transaction metadata and returning the applicable tax category, rates, and withholding tax obligations under Nigerian tax law.\n\n- **Single classification** — synchronous, suitable for real-time use cases (e.g. POS, live checkout)\n- **Batch classification** — asynchronous bulk processing with job status tracking\n\n---\n\n### Authentication & Error Handling\nAll requests are authenticated via an `API_KEY` variable. Each endpoint includes documented examples for the full range of HTTP response codes: `202`, `400`, `401`, `402`, `403`, `404`, `422`, `429`, and `503`.\n\n---\n\n### Variables\n| Variable | Description |\n| --- | --- |\n| `{{base_url}}` | Base URL for the TaxStreem API (e.g. `https://api.taxstreem.com/v1`) |\n| `{{API_KEY}}` | API key used for authenticating all requests |","schema":"https://schema.getpostman.com/json/collection/v2.0.0/collection.json","isPublicCollection":false,"owner":"57772137","team":36822787,"collectionId":"4235b41e-45a4-42cc-9e5a-a6c93605ca6a","publishedId":"2sBYAuRqTn","public":true,"publicUrl":"https://documenter-api.postman.tech/view/57772137/2sBYAuRqTn","privateUrl":"https://go.postman.co/documentation/57772137-4235b41e-45a4-42cc-9e5a-a6c93605ca6a","customColor":{"top-bar":"e4e4e4","right-sidebar":"e4e4e4","highlight":"0072F5"},"documentationLayout":"classic-double-column","customisation":{"metaTags":[{"name":"description","value":"taxstreem, tax, 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