> ## Documentation Index
> Fetch the complete documentation index at: https://docs.commenda.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

Commenda allows your team to manage your entire global indirect tax workflow via API, from registration to tax calculations, filings, and registration threshold tracking.

## API Capabilities

**1. Global Indirect Tax Calculation**

* Calculate accurate indirect tax rates for each transaction across supported countries (US, GB, and more).

**2. Transaction Management**

* Create new transactions to track tax liability.
* Retrieve transaction details.
* Amend existing transactions.
* Archive transactions.
* Get detailed tax reports including `expected`, `actual` and `adjusted` tax amounts.

**3. Registration threshold tracking**

* Track your progress toward registration thresholds across US states, Canada, the UK, and the EU.
* Evaluate trade bloc rules including EU Union OSS, Non-Union OSS, and IOSS schemes.
* Track your historical liabilities across jurisdictions.
* File VDAs.

**4. Tax Registration Management**

* Submit your existing registrations to Commenda.
* Request a new state registration.
* Retrieve existing registration details.
* Update existing registrations.

**5. Filing Information**

* Get your historical and present compliance calendar. This includes all the state and local filings.
* Generate filings and assign them to Commenda. Commenda will then take care of your filings and programmatically keep you updated using Webhook events and jobs.

**6. Customer Information**

* Create and update customer profiles.
* Submit customer exemption certificates.

**7. Exemptions**

* Create exemption certificates for customers.
* Retrieve all exemption certificates.
* Update exemption certificates.

**8. Files**

* CRUD APIs for files managed on Commenda.

## Base URL

All API endpoints use the following base URL:

```
https://transaction-tax.api.in.commenda.io/api/v1
```

All endpoint paths documented in this reference are relative to this base URL. For example, the tax calculation endpoint `POST /calculate` should be called as:

```
POST https://transaction-tax.api.in.commenda.io/api/v1/calculate
```

## Authentication

We implement Bearer token authentication to secure our APIs. This method requires you to include a valid token in the Authorization header of each request. The format is as follows:

```json theme={null}
"Authorization": "Bearer <your_token>"
```

Replace `<your_token>` with the actual token provided to you by Commenda.

Request API keys from the Commenda team for both testing and production.