---
title: "v.2026-01-27"
description: "In API version v.2026-01-27 we have adjusted how the api/v1/payments endpoint calculates tax."
date: "2026-01-27"
url: "https://docs.komoju.com/en/changelog/v2026-01-27"
source_url: "https://docs.komoju.com/en/changelog/v2026-01-27.md"
language: en
---

In API version v.2026-01-27 we have adjusted how the `api/v1/payments` endpoint calculates tax.

# Updated Endpoints

**Tax calculation changes**:

- [POST payments](https://docs.komoju.com/en/api-reference#2025-01-28/tag/payments/POST/payments)

# Tax Calculation Changes

Made changes to how tax is calculated based on the request object, this change was made to make tax more intuitive by only allowing automated calculation to occur when explicitly defined with `auto`.

## `POST Payments`

The payments `tax` calculation logic has been changed.

- **Return value calculation changes**:
- `tax`: Tax is no longer automatically calculated when `tax` field is not included in request, if `tax` is not included in the request the calculated `tax` will be set to `0`. Tax will still be automatically calculated if `tax` is `auto` in the request.

[Full API Reference for this endpoint](https://docs.komoju.com/en/api-reference#2025-01-28/tag/payments/POST/payments)