HSN Lookup
==========

Look up Harmonized System of Nomenclature (HSN) codes for goods classification.

What is HSN?
------------

HSN codes are internationally standardized codes used to classify goods for taxation purposes. They help determine the correct GST rates for different products.

API Endpoint
------------

.. code-block:: bash

   GET /tax-lookup/v1/hsn/{code}

Example Request
--------------

.. code-block:: bash

   curl -H "Authorization: Bearer YOUR_API_KEY" \
        https://api.fastgst.in/tax-lookup/v1/hsn/123456

Response Format
--------------

.. code-block:: json

   {
     "hsn_code": "123456",
     "description": "Sample product description",
     "gst_rate": 18,
     "category": "Electronics",
     "valid_from": "2023-01-01",
     "valid_until": null
   }

Common HSN Categories
---------------------

- **Electronics**: 85xx series
- **Textiles**: 50xx-63xx series
- **Chemicals**: 28xx-38xx series
- **Machinery**: 84xx series

Use Cases
---------

- E-commerce product classification
- Invoice generation
- Tax calculation
- Import/export documentation