> For the complete documentation index, see [llms.txt](https://docs.cleartax.in/cleartax-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cleartax.in/cleartax-docs/tds-api/introduction-to-tds-api.md).

# Introduction to TDS API

<mark style="color:red;">**These APIs are deprecated and no more supported.**</mark>&#x20;